ACURA MDX . ORG
www.acuramdx.org ACURA MDX . ORG Archive > General > Problems
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Broken Rear AC. Grrr... - Click HERE for Original Thread
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BWSmith201
Hi all, please forgive me if this should be redundant. I did a search and didn't have any luck...

The rear AC in my X is not working (nor is the heat). THe display lights up when the control is transferred back there (so I figure its not a fuse, correct me if I'm wrong...) but nothing at all happens, no matter what the setting. Not even the fan.

Has anyone else had this problem? If so, is it going to be a pain in the neck to get it fixed? I can't figure out if its the fan, compressor, or what.

I'm still under warranty, at least for another 8k, but I'm concerned that they're going to have to take the whole thing apart, which would doubtlessly take a while (maybe I shouldn't complain about that, eh?).

No kids or anything (someday, hopefully, but that's a separate discussion!), so it really isn't THAT big of a deal, but I wanna get it fixed while its still under the warranty. Don't want the dogs to get too hot!

What has anyone else's experience been?

Thanks for the input!
hammermdx
I remember other folks having the same problem. I think it was either a fuse or broken blower motor, take it to the dealer, should be a warranty item.
MARFONG
I just had mine repaired yesterday. It was a defective transistor. The service advisor knew right away what was the cause. It apparently already has occured on many MDXs. I also got the TSB on the clicking brakes done and the recall on the transmission done. They were finished in less than 3 hours. I was also lucky to get an '04 TSX as a loaner, great car.
danstub
Mine stopped working yesterday at 50,200 miles on a 2002. I am hoping that the dealer will make the repair under warranty.
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hhwc
Same here. Broke rear A/C or blower.
BWSmith201
Whoa! I didn't know this was such a common problem. I'm taking it in on Tuesday for service, I'll ask the service advisor about those causes, for sure. I'll let you all know how it turns out (since I'm sure it will keep you all in suspense until then, after all!).

Thank you all for the input, it's been very helpful!! I didn't have any idea it was such a problem for so many people. Thanks again, have a good one...

BWS
BWSmith201
It turned out to be a defective blower motor. They at first suggested that it might be that transistor, but since there was power for the light on the console they ruled that out.

They kept it over night but it was covered by warranty. No problems now.

Thanks for the help! I appreciate it!

Have a good one...
Mikel
Acura replaced my rear blower motor about a yeat ago at 48,000 miles, though it did take a couple of trips to the dealership; first it was, "what noise?", then after I drove the service tech around for 5 minutes "oh, THAT noise" which they supposedly fixed, and then two weeks later when the thing sounded like a helicopter taking off...they replaced it.

I must say, that in comparison to friends and neighbors who have lesser cars (Chrysler, SAAB, BMW, Mercedes) Honda/Acura does the best job of standing behind their products and taking care of things when they go wrong.
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nwaring
We just discovered this weekend that our rear air unit no longer works. Same as mentioned before...power to the controls but nothing else. The fuse is good. I got my transmission recall notice last week so when it goes in for that I will have them fix it. 2001-43K.

Niles
DaleB
quote:
Originally posted by nwaring
We just discovered this weekend that our rear air unit no longer works. Same as mentioned before...power to the controls but nothing else. The fuse is good. I got my transmission recall notice last week so when it goes in for that I will have them fix it. 2001-43K.

Niles



Same here!! Returning from Tahoe and the aircond was initially running on OT trying to cool the car down when I noticed nothing was coming out of the rear vents. Looks like a trend here. (27K)
Damon
Has anyone seen a TSB on this subject? Just discovered same problem and I am out of warranty.
laborlitigator
You can try to remove the cover (simply lift the shoulder rest and there are two phillips screws that have to be removed and then the cover will come off) and see whether all of the connections are together. Otherwise, it should be the fuse.
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DaleB
Seems to be a more common problem, if the fuse is good, it's more likely the blower motor. Still have not have mine diagnosed yet, but it's still under warranty.
Should not be too difficult for the DIYer to do, with the shop manual.
Motors for rear and front look similar. Good luck finding one (new) under $100.
wamiller
Mine went out last week while on vacation. Talked to a service guy in Huntsville AL while passing thru and he said it was probably the transistor. Said they had done several lately and he was out of them and the part was on national backorder. Must be a trend... Bummer is that I am 5k out of warranty!

Wade
2001 MDX
hammermdx
quote:
Originally posted by wamiller
Mine went out last week while on vacation. Talked to a service guy in Huntsville AL while passing thru and he said it was probably the transistor. Said they had done several lately and he was out of them and the part was on national backorder. Must be a trend... Bummer is that I am 5k out of warranty!

Wade
2001 MDX



I would ask them to cover it as a warranty item since it seems to be a pretty common problem. Escalate to Customer care if you have to.
wamiller
quote:
Originally posted by BWSmith201
It turned out to be a defective blower motor. They at first suggested that it might be that transistor, but since there was power for the light on the console they ruled that out.




Quick question of clarification - If there is power for the Rear Control light on the main panel up front, the transistor is OK? I haven't taken mine in yet and want to make sure they have the correct part before leaving it there. My light does work so based on the info here I figure I've got a bad blower.

Wade
2001 MDX
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DaleB
quote:
Originally posted by wamiller


Quick question of clarification - If there is power for the Rear Control light on the main panel up front, the transistor is OK? I haven't taken mine in yet and want to make sure they have the correct part before leaving it there. My light does work so based on the info here I figure I've got a bad blower.

Wade
2001 MDX



That sounds logical. But I would not replace the blower before actually putting the power to it to make sure it is dead.
mwdelta
The darn transistor is still on backorder, has been for a month according to Acura. The crossover part from the Pilot is also on backorder, although it's somewhat cheaper, so might be worth looking into. I still don't know whether it's the blower itself, the relay or transistor, hopefully should find that out soon.

--Mike
mwdelta
I tested the transistor in mine and it works. Any technically minded people have an idea on what to test next? Where is this relay that was mentioned located? I will be checking the blower motor connections and should have a service manual soon, which will help.

--Mike
pointman
I have a 2001 MDX with 116,000 miles:) It has been a great car but have had a few minor problems. One of them was what you are talking about (the rear blower not working) I don't remember what it is called but there is a device that plugs into a socket under the armrest. If you make sure your drivers seat is all the way back you can remove the panel below the gear shift selector. This piece installs towards the back of the arm rest under the shift selector. If you go into the Acura dealership and tell them what the problem is, they will know what you are talking about. Allthough not reported as a recall problem I think this was a part that went out frequentley. You are lucky as you are still under warranty, I was not and it cost me 160.00:) They can probably install it in 15 minutes:) Anyway, hope that helps, I have run into a few other issues including the tranny recall, so if I can be of help later just ask:)
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DBUFF
Our rear a/c went our at about 40,000 miles also -
Dealer fixed. Seems lots have probelms with it.
pointman
Yes, I think it is. After I replaced the little coil thing to get the rear a/c back up and running, my fan for the rear a/c went out:) LOL:) It is real easy to get to (pull the panel off by the front passenger seat just below the shift selector) so I pulled the fan out and it turned out to be bad brushes in the fan motor. Here we go (Acura wants 200.00 for a new fan motor and that seems the only place you can get one) So, I took the fan motor down to a little electrial motor shop and they gave me some new brushes for about 3.00 and some change. Well, it worked for a while but ultimetley I ended up buying a new motor:) Other then a couple of dash lights going out everything seems to be working well at this time and I am running on 116,000 plus:)
wamiller
I finally took my '01 MDX in this morning to have the rear AC fixed. The problem was the transistor. Based on some earlier posts, I thought my blower might be bad, but that was not the case.

My dealer is Mac Churchill in Fort Worth. I am about 6K miles out of warranty and asked my service advisor what the odds were of getting it fixed under warranty since I wasn't very far above 50K. He said that they would take care of it since I had used them for my 15,30 and 45K maintenance. Less than an hour and I was on my way. Based on some of the horror stories regarding other dealers and their service departments, I can't say enough good things about my dealings with this dealer.

Wade
2001 MDX
octavian
whoa, this seems to be more of a problem than Acura first realized.....thanks for all your input on this. Mine is fine, but this is reminiscent of the weeping mirror problem in the 2001.....a few, then a lot of people commented on the same problem.....maybe Acura will issue a TSB for this as well....
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pointman
Not familiar with that one but, is it the high pitch noise that is made when you are driving over 55 in a pretty strong wind? Very curios about this as my 01 MDX has done this since day one and I am on 116,000 miles now:)
DaleB
quote:
Originally posted by pointman
Not familiar with that one but, is it the high pitch noise that is made when you are driving over 55 in a pretty strong wind? Very curios about this as my 01 MDX has done this since day one and I am on 116,000 miles now:)


Lots of info on it here...do some searches....mostly related to the front windshield (thinner glass & seal) .. putting window screening spline in the 'groove' around the window seal seemed to help.
Repositioning the roof rack beginning in 02 seemed to quiet things down also.
116K miles, that's great!
pointman
Great:) Thanks for the info:)

Has anyone heard anything yet on the next gen MDX that is supposed to be coming out in the fall of 05? I did hear that it should have the same 300hp engine that is coming out in the new RL
rflagg
All,

Like the above posts, my rear fan is not working, even in manual mode. The fuse is fine, and the vent selection buttons light up in manual mode.

So, I want to first figure out where this transitor is that might need replacing.

I removed the lower panel on the drivers side, below the gear shift. I also remove the plood on the gear shift. I also took out the drink holder.

Can some one tell me what else needs to be removed so that I can locate this transistor? Also exactly where is it? How big is it?

I also don't know how to take the center console apart, any more that it already is.

Help!

rflagg
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mwdelta
The only trim piece you need to remove is the plastic side of the center console, which goes from the firewall to the front of the seat. After moving the seat back, pull out at the front, popping the clips and remove the panel. The transistor is located inside of a boot-shaped opening near the front of the seat (right of the blower intake screen). The TSB suggests wearing protective gloves while removing this item. Reach into the hole, depress the lock tab, allowing the transistor to turn clockwise. Once it's free, pull it partway out and disconnect the harness. You need to then do a resistance test to see if it's working correctly or not. PM me for a copy of the TSB if you'd like to see pictures or more instructions for removal.
livinglegend
The transistor is bad. It is located under the shifter console, and can be changed out easily by pulling off the side console cover.:4:
mwdelta
It's important to note that the whole system seems to be occasionally flaky, so although the transistor is a TSB item, it's not always the culprit. Mine has the exact same symptoms as rflagg's, however my transistor tested fine so it's probably another component. According to the TSB, there are over 50 pages in the service manual about troubleshooting the system.
nwaring
Ours has been fixed and they replaced the transistor. The service order read...”replaced transistor per service bulletin”.

Niles
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ByeByeChrysler
I just joined the "Rear A/C Not Working Club"

67,000 KM - kids noticed it, who knows how long ago it happened.

Got a call into the dealer.
ByeByeChrysler
quote:
Originally posted by ByeByeChrysler
I just joined the "Rear A/C Not Working Club"

67,000 KM - kids noticed it, who knows how long ago it happened.

Got a call into the dealer.



it was the transistor, $25 deductable with my extended warranty fixed it.

if a TSB was issued, shouldn't it be free to fix??
DidMoroz
I had same problem with rear AC on 2002 MDX. Turned out the thermal fuse by the power transistor was blown. Cost me 99 cent to fix it. The hardest part was to find the fuse with same temp and amp ratings.
ltkrm
Mine just went out too. I've already made an appointment with my dealer since I'm still under warranty (46K).
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JFix
The rear A/C on my MDX recently stopped working at 56,000 miles. I tried to sweet talk the local dealer into covering it under warranty - no luck. Last night I started troubleshooting the problem myself. Fuses are all fine. I ran the self diagnostic on the rear A/C unit, which showed no trouble codes (all I got was the initial 2 second illumination of the upper lamp, followed by nothing). I then pulled both the left and right panels off the center console. I removed the fan motor plug, and checked voltage. Voltage across the plug connectors was a constant 12 Volts, regardless of what position the fan motor speed or Rear A/C control switches were set. This was a little confusing as I thought the voltage should vary with fan speed setting. I then checked the fan motor with an external battery and it worked fine. On the left side of the console, near the fan intake, I am only able to find a relay. The relay contacts sound like they click in and out when I disconnect and reconnect the connector. I did not see anywhere inside the console a resistor board or other device to regulate fan speed. One odd item I should mention is that when I touch the fan motor power connector to the fan motor, I get a small electrical response, maybe enough to turn the fan a quarter turn. I can repeatedly make and break contact with the connector to get the fan running at a slow speed. I have temporarily wired a plug directly from the fan motor to a cigarette lighter jack as a temporary fix. My wife can now plug the rear a/c fan into the cigarette lighter to keep the kids cool until I figure this out. I would really appreciate it if anyone has any input as to what the problem may be and where the fan control transistor/resistor assembly is mounted; the only electrical device I can find near the fan motor is the before mentioned relay block. I hate to shell out $90 to the dealer for a transistor that may or may not be the problem, and I am sure that constantly plugging/unplugging the rear fan is going to get old quick with the wife. Thanks in advance for any help.
DidMoroz
JFix, like I said in my earlier post problem with my rear AC was bad thermal fuse. I am not sure if you check that one or not, it is the fuse inside of transistor assembly, not under the dashboard. It is very easy to check if the fuse is good or bad. Just place the Ohm meter leads across the fuse and if resistance is infinite it is bad. I am 99% sure this is the problem, if not your transistor is bad and you will need to buy whole new assembly from the dealer, as there is almost impossible to cross reference this transistor. Like I said before it cost me 99 cents to fix this problem and about 30 min of my time. The hardest part is to find correct fuse: 2A 114C ratings as normal electronics store does not carry them. Will try to post some pictures, this is my first time posting them so I am not sure if it will work on first try. I hope this helps.
DidMoroz





hammermdx
Great pics, thanks for posting!
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Fireblade6
I notice mine stop working after an accident. It did not work after I too delivery of my 2001 MDX back from the body shop. Spoke to my insurance, they informed me just to take it back to the dealer to have them look at it.
Emerald01
DidMoroz, Great post. My rear ac is still working but plan to keep this post for possible future reference.

Where did you find/purchase the thermal fuse?
M. Gabris
I have a 2002 mdx and the rear controls arent working - lights go on on the button when I hit the rr ac manual but no fan. Fuses look good. Its under warranty so my next move is to take it to the dealer.
ByeByeChrysler
quote:
Originally posted by M. Gabris
I have a 2002 mdx and the rear controls arent working - lights go on on the button when I hit the rr ac manual but no fan. Fuses look good. Its under warranty so my next move is to take it to the dealer.


my scenario too.
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mp29a4
quote:
Originally posted by DidMoroz
JFix, like I said in my earlier post problem with my rear AC was bad thermal fuse. I am not sure if you check that one or not, it is the fuse inside of transistor assembly, not under the dashboard. It is very easy to check if the fuse is good or bad. Just place the Ohm meter leads across the fuse and if resistance is infinite it is bad. I am 99% sure this is the problem, if not your transistor is bad and you will need to buy whole new assembly from the dealer, as there is almost impossible to cross reference this transistor. Like I said before it cost me 99 cents to fix this problem and about 30 min of my time. The hardest part is to find correct fuse: 2A 114C ratings as normal electronics store does not carry them. Will try to post some pictures, this is my first time posting them so I am not sure if it will work on first try. I hope this helps.


Where did you get your thermal fuse? Is 2A for 2 amps and is 114C for 114 degrees centigrade? Thanks.
squaw_ski_bum
some troubleshooting advice is here: http://www.acuramdx.org/forums/show...?threadid=19456

which tells you how to get a trouble code to help isolate the problem.
Sinecure
In my latest trip to my service shop (not Honda but a place called Honda Hospital - they own two MDX's between the owners) they did a service related to this. In the first DidMoroz pics above you can see a screen on the left side. This is a filter for the rear A/C. It tends to get clogged with lint/dust causing the blower motor to work extra hard. They surmise that this is causing many of the transistor and blower motor problems. The removed the screen and blew it out. If you know how to take apart those trim pieces and have an air compressor, you could probably do this work yourself in less then 1/2 hour.

Oh, and FYI, the TSB on the transistor is number 03-021
mp29a4
Thanks.
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mp29a4
quote:
Originally posted by squaw_ski_bum
some troubleshooting advice is here: http://www.acuramdx.org/forums/show...?threadid=19456

which tells you how to get a trouble code to help isolate the problem.



Thanks.
DidMoroz
Mp29a4,
2A is for 2 amps and 114C is for 114 degrees Celsius.
Most fuses you will find in Radio Shack are 10-15 Amps. Little too big for this job. I ended up special ordering fuses through local electronics store.

I have couple fuses left, if anyone is interested for a small fee I will replace fuses for you.
mp29a4
Thanks. I found some at www.digikey.com. The Digikey part no. is P10920-ND, made by Panasonic, whose mfg. part no. is EYP-2BN109. Decription: Thermal Cutoff 114C 2A/250VAC.

Here is the URL right to the info page for this part: http://dkc3.digikey.com/PDF/T052/1185.pdf

Also, Digikey's number is 800-344-4539.
harmonr1
quote:
Originally posted by wamiller


Quick question of clarification - If there is power for the Rear Control light on the main panel up front, the transistor is OK? I haven't taken mine in yet and want to make sure they have the correct part before leaving it there. My light does work so based on the info here I figure I've got a bad blower.

Wade
2001 MDX



NO! The rear control lights light up just fine. The transitor just controls the blower motor. I had mine replaced last week. They had to order the part as they were out of stock but it only took about a week. The good news is that it's about a 10 minute repair.
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DidMoroz
quote:
Originally posted by mp29a4
Thanks. I found some at www.digikey.com. The Digikey part no. is P10920-ND, made by Panasonic, whose mfg. part no. is EYP-2BN109. Decription: Thermal Cutoff 114C 2A/250VAC.

Here is the URL right to the info page for this part: http://dkc3.digikey.com/PDF/T052/1185.pdf

Also, Digikey's number is 800-344-4539.



Looks like DC rating is @ 5A
I hope that works good for you.
Neo
Do you guys know if the dealer replaced the just the transistor:



or did they replace this entire unit:



I can't imaging them going in and messing with the internals so my guess would be the part in the second pic. But then again, it is only a guess and that's why I am asking.

Do you know how much the replacement part is? My 02 is out of warranty (via mileage) and Acura estimated $240 to replace the transistor. They did not even look at the car and assumed it was the transistor. That's how common this is, I suppose.
hammermdx
What a rip, you should ask them to "goodwill" the fix and print this thread and give it to them as this is a pretty common occurrence.
Neo
Tried the goodwill. No cigar. :(

But, I don't use Acura service too often so I can't imagine they would have extended the goodwill anyway.
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DidMoroz
Neo, go ahead and buy transistor assembly from the dealer and replace it yourself. Very simple procedure and will cost you $83.57 plus shipping if you buy it from acura.com, or get it from the dealer. It is item # 15 on the picture.



Neo
quote:
Originally posted by DidMoroz
Neo, go ahead and buy transistor assembly from the dealer and replace it yourself. Very simple procedure and will cost you $83.57 plus shipping if you buy it from acura.com, or get it from the dealer. It is item # 15 on the picture.


That is great info. Thanks.

Has anyone gotten this part from Tim? Maybe I'll send him a note. :)
Neo
Just a quick update. I called my local dealer and they had 1 transistor assembly left for the price above. With tax it came out to about $90.

About 20 minutes of work (and I was being very careful) and I have rear vents again.

:18: to DidMoroz for posting basically all the images and info I needed to get this done.
hammermdx
Maybe Tim shoud run this part as an August special. :4:
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gerrypez
DidMoroz,

Thank you for posting a solution. I have a 2002 MDX with 65K miles, and the rear fan/AC stopped working. I've order the transistor assembly from acura.com, and hope to do the repair myself for $83.57.
gerrypez
DidMoroz,

Thank you for posting a solution. I have a 2002 MDX with 65K miles, and the rear fan/AC stopped working. I've order the transistor assembly from acura.com, and hope to do the repair myself for $83.57.
gerrypez
DidMoroz,

Thank you for posting a solution. I have a 2002 MDX with 65K miles, and the rear fan/AC stopped working. I've order the transistor assembly from acura.com, and hope to do the repair myself for $83.57.
DidMoroz
I am glad I can help.
If any one would like to save some more money go ahead and try replacing thermal fuse (cut off) using my original post on previous pages. Very simple procedure as well, just need some basic soldering skills. Including a copy of the thermal cutoff from digikey.com, looks like some people have used this part to fix their rear AC problems.

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Rick_James
This should be a Sticky imho.

This issue was the main reason why I did not get the MDX I could of purchased this past Friday. Now knowing it would only cost me 90.00 to fix,,, I am sadden I past on my 01 MDX purchase :(
gerrypez
So the $84 fix worked and was pretty easy.

I noticed the metal air filter was clogged up (I vacuum cleaned it), so I don't feel the problem was due to the MDX, but to me not cleaning the rear air filter (located by drivers right foot).
TnR
I replaced the thermal fuse. Piece of cake with all of the posted pictures and info.
Now the rear AC is on High fan as soon as the ignition switch is turned on. The rear control has no effect and the front rear AC button has no effect either. I have removed the transistor unit because the continuous noise is unbearable. This is my wife's car, and she says she does not recall the fan staying on high prior to it failing.
I'm thinking that another component in the transistor is bad and may have been the cause of the thermal fuse to go in the first place. I hate the thought of shelling out $85 to replace the transistor unit to find out that there is something else causing this.
Does anyone know how to test the transistor to see if it's functioning properly?
Any other suggestions?

Thanks for all the info. Without it I would have never gotten this far.
7plus
My rear ac is no longer cooling. And my rear is upset.

I will begin the fixes posted here.

Stay tuned.
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BLEXV6
quote:
Originally posted by MARFONG
I just had mine repaired yesterday. It was a defective transistor. The service advisor knew right away what was the cause. It apparently already has occured on many MDXs. I also got the TSB on the clicking brakes done and the recall on the transmission done. They were finished in less than 3 hours. I was also lucky to get an '04 TSX as a loaner, great car.


I too had the TSX loaner last time and I liked it a lot. Peppy little thing with a good sounding stereo system.
mp3car
Add me to the list...

we just bought our 02 from my parents... It has the rear ac problem...

I will track it down this afternoon, and post the results... I'm an EE, so Im thinking the task shouldn't be "too" difficult ;)
7plus
I'm amazed that a $0.45 thermal fuse was the fix. Yes, the net cost was more but that little fuse fixed my rear ac problem. I was amazed how easy it was, once I had the pieces. I got a quote from a mechanic who said he'd charge $200 just to breakdown the center console and hopefully diagnose the problem.

I could not have done it without the post by Didmoroz, thank you.
vdo
Thank you for those who posted the great information about the rear ac problem. I got this problem and brought it to the dealer for fixing. They gave me exactly the problem on the transistor and want a charge of $331.00 for replacing it because my X is 01 model and out of warranty. Should I let them fix or I just follow the instruction in this great thread and do it by myself? I call the Acura Customer relations and reported the problem and they said they're just able to note my problem and then would decide if it should be a recall or not. For now, I have to pay $95 for diagnostic at South Coast Acura, CA. I think we should report this problem to Acura so that it'll become a recall for their bad quality.
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Mocking-DX
add me to the rear ac problem
will try to diagnose it myself too before bringing to the dealer

AND of course THANKS to all who contributed on how to do this ourselves
Rocket1
Just noticed the rear a/c stopped working. This is a great thread, I ordered the parts today from acura $85.00. Will install it this weekend.

Thanks for the help here.
cabman
Hey, you guys are lucky. First my rear went out, and now my front went out. I own a 2001 Touring/Nav. Mine is in the shop, and for $383.00 more dollars, I get a new blower and transistor. The dealer in San Antonio acted like this never happens. You all should start saving for the front A/C next.
Mocking-DX
changed the $0.45 thermal fuse---bammm it works again
wooohooo
thanks guys esp didmoroz
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wadewilk
Me too....

Cost me a couple of bucks from DigiKey, 7 bucks for a Radioshack solder iron kit, and bam, works like a champ.

This is a fantastic website.
leed006
I just bought a 2002 MDX and it has the rear AC problem. I read through messages posted in this thread few times, but still could not figure out where that transister assembly is. With the great pictures posted here, I would like to try fix the fuse myself. Would someone kindly point me to the right direction?

Thanks in advance.

Daniel
hammermdx
quote:
Originally posted by leed006
I just bought a 2002 MDX and it has the rear AC problem. I read through messages posted in this thread few times, but still could not figure out where that transister assembly is. With the great pictures posted here, I would like to try fix the fuse myself. Would someone kindly point me to the right direction?

Thanks in advance.

Daniel



It's on the dirvers side to the right of the gas pedal. Just pull off the plastic cover and then you can follow the directions per the pics that are in this post. You will all see a small round metal screen. This is the filter for the rear ac/heat, and you should make sure it is clean too. BTW, welcome to the family!
leed006
Thanks, HammerMDX.

I took the transistor assembly out of the car today. Both RadioShack and Fry's don't have the fuse. A technician at Fry's tested and confirmed that it is a blown fuse (the circuit is open). Anyway, I ordered three fuses (Yes, the same ones, just in case I need it again later) from digikey.com. Hopefully that will take care of rear AC problem.

Thanks again.

Daniel
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leed006
Sorry, hammermdx, for mispelling your name. :(
hammermdx
No problem, you can always "edit" your own post to correct typos. Glad I could help!
leed006
:2: The fuses came in today. I bought a soldering kit from RadioShack. After 5 minutes of "hard work", my rear AC is working again. Hopefully I don't need to use the 2 spare fuses later.

Thanks to all for posting this useful information.
mdxPirate
I'm so glad I checked this forum before taking in my 2001 MDX to get the rear AC fixed. I too replaced the thermal fuse and sure enough, I was rewarded with nice cool air. Thanks to everyone that posted on how to fix it!
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slash007
I have the same problem. I havn't checked to see if it is the thermal fuse, but I'm assuming that it is and ordered it from digikey. It is only .45, but after shipping and handling it was almost $8
vetdude
Our '02 is going into the dealer Monday for the rear a/c as well as fix for noisy (whirring) front HVAC blower fan (warranty). Service writer showed me a fan they had removed from another MDX with the same problem. Seems a squirrel or mousr had built a nest in the fan itself - filled with pieces of insulation and acorns! He also said they've seen them with a dead mouse, even a dead snake, trapped in them!!! Nice. :(
chadsMDX
Bought a Used MDX 02 and had same problem, read this thread and figured out what was going on. (after I disassembled half the car looking for loose connections) Found an Acura dealer on EBay that had the part for $66.00, but its 101 her so went to local Acura dealer on they had it on hand for $87.
the lights were working on the rear a/c, so plugged in the new transistor and works perfect now. One thing I did notice was that the screen on the blower was coated in lint, removed all of that, and the new transistor has been modified a little. Did not pull of the cover, but the cooling fins are dome shaped instead of flat.
One last note, My front fan makes a vibrating sound when it is at full speed, usually with I get in the car and Auto system is trying to cool off. Anybody have anything similar to this?

Thanks,
Chad