Last post on Nov 13, 2013 at 2:35 PM
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Honda Pilot, Heating / Cooling, SUV
#1 of 72 2003 Honda Pilot Air Conditioning mystery
Jul 10, 2008 (3:17 pm)
Our air conditioning suddenly stopped, apparently on start-up recently. The compressor doesn't kick in at all, and the ventilation fan doesn't turn on either. No heat either. Serpentine belt is fine. The control console for heat and air conditioning all seems to look and function normally. Just no air flow or compressor action.
I checked the fuses in the main fuse panel and under the driver's dash and all are fine.
I also switched around the large relays (the ones which are identical) in the main fuse panel in case one was blown, with no results.
#2 of 72 Re: 2003 Honda Pilot Air Conditioning mystery [piealot]
Jul 10, 2008 (8:43 pm)
This same problem happenned to my '03 pilot and you can fix it yourself. The part that needs replaced a resistor located behind your glove box. I purchased from a local honda dealer and at the same time asked one of the mechanics on how to replace it. You have to remove your glove box to get to it easier. It's a little bit difficult but i was able to do it with a phillip head screwdriver (long and short one) and a rachet set. The mechanic told me it would be a good time to replace your in cabin air filters too and told me that if you don't replace them every 25,000 to 30,000 miles, it allows this transistor to overheat and fail. Once I replaced resistor part, the AC worked as good as new. The resistor cost me about $87.00. Hope this helps.
#3 of 72 Re: 2003 Honda Pilot Air Conditioning mystery [leo41]
Jul 10, 2008 (8:45 pm)
Sorry for all the grammer mistakes--1st time posting.
#4 of 72 Re: 2003 Honda Pilot Air Conditioning mystery [leo41]
by Stever@Edmunds HOST
Jul 10, 2008 (8:45 pm)
Welcome to CarSpace. After posting, you may edit your post for 30 minutes. Just click the Edit link near your name in the post title.
But we're all pretty fluent in chat typo around here.
#5 of 72 Re: 2003 Honda Pilot Air Conditioning mystery [leo41]
Jul 11, 2008 (7:01 pm)
Hey Leo 41,
Your reply is just what I was hoping for, a solution that was not obvious but works. I dropped down the glove box and I see a small black electrical relay box or something way over to the right by the side of the access opening. Could that be it? Looks like maybe a relay.
Also I see a vertical black plastic removable panel to left of center of the opening which I suspect has the cabin air filter behind it. I'll have to remove a horizontal steel bar though first to get it out. And I see another foam air filter looking at me which is visible and I guess is the recirculating air filter.
Any other tips?
Jul 12, 2008 (7:57 pm)
The piece I replaced was close to the back of the floor board. It had 4 screws to remove it and the cord that was attached to the resistor plugs in the stationary mount like lego's. The biggest pain was removing/replacing the 4 screws on the resistor and replacing the glove box. I would strongly suggest putting new cabin air filters in--it does make difference in the air quality. If a honda dealer/mechanic or someone from autozone can show you exactly where the piece is, that would be the way to go.
Jul 13, 2008 (5:19 pm)
Thankyou. I found the unit OK. It is on the bottom of the blower unit. I found the following link online if someone else has the same trouble:
Q. My question has not been addressed.... The question is... I have a 2004 Honda EX Pilot. the a/c has stopped blowing. The blower works intermittently and when it blows it only blows out of the back unit. I have checked all fuses and they are all working. When the A/C kicks in it does blow cold air.
Edited by Customer (name blocked for privacy) on June 29 2008 at 7:20pm
A. Does the air blow out the front vents on high speed or full auto?
Sounds like the power resistor for the front blower motor is bad.
There is a way to test it to see if its definately bad.
Here is how:
1. Carefully release the lock tab on the No. 3 terminal (ORN/BLK) (A) in the 5P connector, then remove the terminal and insulate it from body ground.
1. Reconnect the 5P connector to the power transistor.
2. Supply 12 volts to the No. 3 cavity with a jumper wire.
3. Turn the ignition switch ON (II), and check that the blower motor runs.
o If the blower motor does not run, replace the power transistor.
o If the blower motor runs, the power transistor is OK.
I did this test and apparently the transistor is blown since the motor did not run.
#8 of 72 Hurray! It woiks!
Jul 17, 2008 (4:51 pm)
The part I changed (Front Air Blower Resistor) is made by the same Japanese manufacturer as the original (Denso) [umm not the brainiest company name] and is pretty much identical except that it has 4 cooling fins instead of two.
For others of you with the same problem, O'Reilley's Auto Parts here in Minnesota shows the part on their computer and it was special ordered for $56 plus $7 shipping. Took 4 days. The new part is from BWD Engine Management Technology of NY state, part #RU 1044 "Resistor", says the box.
O'Reilley's also has the pollen air filter for $20.
#9 of 72 2003 Honda Pilot rear AC blower does not work
Jul 31, 2008 (12:29 pm)
Honda service bulletin 03-048 relates to problem.
Cause is Open circuit in the power transistor
Looking for replacement for Power Transistor as local dealer does not stock it.
Price is $150.00
Is there a place to buy?