Hello folks. I have a 2007 AP2. 6000 miles on dial, just recently picked it up. Some hot days lately not always accompanied by sun, therefore goto use AC ambient air is all I get for temp.

Open hood AC clutch is "NOT" spinning I've confirmed this. Press AC dash button and fan does come on and off as it should, but clutch will not re engage. After car sits for a few hours you start up and put AC on and she's ice cold, drive for a hour to two on a hot day and then it doesent work, whether you actually have it on or not. What's strange also is it seems sometimes work for hour plus but when shut off and start again she's back to no clutch engagement and warmer air of course.

Things I've had looked at and done are as follows...

1.) system completely purged and refilled at a honda dealer to ensure no moisture and proper amount
2.) checked and confirmed no leaks, pressure and dye test
3.) heater valve etc is working as it should
4.) checked over all wiring as can, fuses and relays all good

Last time at shop they had it for 3 hours and of course it wouldn't fail and they could not remedy anything so out dollar bills. This is getting frustrating to say least cause "sometimes" I don't want not to have to have top down. I've searched Google, and spent last week to two browsing threads and what I'm experiencing I can't see to find a case so looking for someone that may have had this experience and some guidance. Looking for ideas I'd love to resolve this as rest of car is well... Perfect really. My mind says some sort of a heat soak issue something is not agreeing with here, some sort of thermal switch perhaps?? I'm not super knowledgeable on these cars as of yet so looking and hoping for a direction of advice to resolve this.

 

Is it feasible to go directly to the shop while you are having the problem sometime? You've spent a lot of money with your shop on this already, surely they can be willing to accept you for a quick diagnosis while it's occurring. One would hope, at least.

 

You check the AC compressor thermal protection circuit? It's a device wired onto the compressor.


Good luck!

 

Things that could cause A/Ccompressor to shut off (disengage compressor clutch)

1. 1. A/C system pressure too high or too low. (orsensor malfunction)

2. 2. Evaporator temperature too low. (or sensor/sensor circuit malfunction)

3. 3. Engine temperature too high. (or sensor/sensor circuit malfunction)

4. 4. A/C cooling fan malfunction.

5. 5. Compressor clutch malfunction.

6. 6. Compressor clutch circuit open or short to ground.(most likely relay issues)

7. 7. A/C switch on dash. (malfunction switch)

8. 8. WOT (wide open throttle)

Compressor clutch is logicallycontrolled by the ECM via a relay circuit. When A/C is requested, the ECM suppliesa ground to the control side of the relay (low current). The relay then switcheson the load circuit (high current) which supplies current to the compressorclutch.

The first step to diagnosingproblem is to check for voltage and ground at the A/C compressor relay. Identifythe control and load side of the relay. If the A/C is requested, there shouldbe voltage and ground on the control side of the relay. This means ECM is telling theclutch to engage. If that’s the case the problem is within the relay circuit orthe compressor clutch. If not, then the problem becomes more complex. As theECM decides that is it unsafe to turn on the A/C compressor because one or moresignals it receives from the sensor is abnormal. This could be cause by sensorfailure, sensor circuit failure, and mechanical system malfunction.

 

Ok thanks folks. I'm hoping to have a day off when warm soon so I can drive it and actually hopefully have it not work to test more. Your responses give me more to look at thank you.

 

i would think if you brought it directly to a AC repair shop they should know quickly but i do agree it seems like it thinks the pressure might be too high and not turning on. Usually they use a scan tool to check the actual readings of it.

 

I had that same exact problem with my civic, turned out I needed a new drier and expansion valve. My car would have the ac work like a charm once I started it up, then randomly in stop and go traffic it would stop blowing cold air. I wasted like $450 to fix a couple of parts that cost $60 combined + the cost of recharging the system, you live you learn.

 

Well good and bad news. Replicated issue today, with comments and notes from here hooked up with a tech with meter. Took out solenoid car off (engine bay hot) and line from relay to AC compressor good, power to switch to replicate AC being demanded and (no click) . So the AC compressor clutch it is apparently. Car cools off and then good to go again. Now real issue here in Canada at least the AC compressor clutch assembly is back ordered to July at earliest. So..... Any reccomendations as to where to get these (anywhere)??

Another odd point when Honda brought up VIN # found out car had been in 3 times from previous owner unable to find issue or have it fail? So basically since new this car has had a botched clutch? Just over 6k miles on this car simply bizzare...

 

For the next guy teading this thread...most things on this car are S unique, and really require someone that knows these cars to work on it.

Not so the AC. Its like any other car. So anyone that is good with AC can fix it. This is probably not the dealer (as evidenced by this car having been to dealer 3 times before this guy even owned the car, then several more times with him, all to diagnose something that turned put to be something simple.

 

Indeed. However finding a replacement clutch sounds though it will be "not so simple"..