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2007 Honda CR-V: AC stopped working #5133754 06/14/19 01:05 AM
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Blurider24 Offline OP
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Hey All,

I was driving along the highway through Utah (103-108 degrees) and the AC stopped blowing cold and never came back--it's been out for 3 days.

Here's what I know:
1. The cabin/blower fan, as well as the AC, Max AC lights all work.
2. The Condenser fan outside works fine when the AC is "on" inside the car, but the clutch never engages the compressor pulley.
3. I've swapped the relays--no change in behavior.
4. Under hood fuse 20 and under dash fuse 36 are all intact.
5. The clutch spins freely without drag--the gap is appropriately between 0.35 and 0.65mm
6. The pulley wheel spins without issue when the engine is on.

I was thinking I need to replace the clutch/pulley/coil combo, but here's the kicker...
I went to AutoZone today, borrowed a Low side pressure gauge. The pressure was solidly in the Red (more than half way between 60 and 150PSI) with 2 separate gauges with several measurements. The AutoZone tech vented the Low side line into the air, via the gauge, and the reading returned to the same pressure (in ~5-10 seconds) once the valve was released again.

I'm stumped now, but am fortunately in a cooler climate and can wait for a bit...buuuut I would like to get it resolved. Thoughts??


2007 Honda CR-V EX AWD 165k miles
----------------------------------------------------
Quaker State UD Syn 5w-20 (7-8k OCI)
Fram Ultra Synthetic (Every other OC)
Valvoline MaxLife ATF (Every OC)
Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5133757 06/14/19 01:34 AM
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The Critic Offline
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https://f01.justanswer.com/clmcr8/9713d786-4797-4430-a811-92742d786718_bulletin.pdf

A/C compressor clutches can be problematic on those. Not saying it is your problem, but it is one area you should definitely check.


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Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5133768 06/14/19 02:52 AM
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Gasbuggy Offline
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Honda did extend the warranty on the compressor because of issues.


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Re: 2007 Honda CR-V: AC stopped working [Re: The Critic] #5133769 06/14/19 03:17 AM
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Blurider24 Offline OP
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Originally Posted by The Critic
https://f01.justanswer.com/clmcr8/9713d786-4797-4430-a811-92742d786718_bulletin.pdf

A/C compressor clutches can be problematic on those. Not saying it is your problem, but it is one area you should definitely check.


I did know that there was a TSB on the clutch, but this is the first I'm seeing of the PDF you linked. I did inspect the armature plate yesterday and it definitely showed moderate to major heat damage (not semi-gloss black). I decided to order the armature, pulley and coil set, but thought about stopping at parts stores on the way home. I did that and then did the pressure test noted above, which threw me for a loop...so, I may just do the combo (armature/pulley + coil), being as parts are ~$60 and it doesn't require a full system recovery and refill.

Originally Posted by Gasbuggy
Honda did extend the warranty on the compressor because of issues.

I'm at ~159,000 miles though--I don't think they'd offer a "good will" discount/coverage for being well past 100k miles.

Last edited by Blurider24; 06/14/19 03:19 AM.

2007 Honda CR-V EX AWD 165k miles
----------------------------------------------------
Quaker State UD Syn 5w-20 (7-8k OCI)
Fram Ultra Synthetic (Every other OC)
Valvoline MaxLife ATF (Every OC)
Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5133777 06/14/19 03:53 AM
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grjr Offline
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dont let autozone employees work on your car, they are not mechanics. There was likely nothing wrong with the pressure in your system. When the compressor has not been running, pressure in the system will be somewhere near the ambient temperature for R134a systems. The autozone guy just vented some of your refrigerant for no reason duh.

Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5133786 06/14/19 04:19 AM
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Trav Offline
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Did you check for 12v at the compressor itself, power on A/C on?


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Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5133817 06/14/19 05:30 AM
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miden851 Offline
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2008 Mazda6i GT; @234K miles
2016 Honda CR-V EX-L; @51K miles
Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5133827 06/14/19 05:55 AM
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atikovi Offline
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Originally Posted by Blurider24
The AutoZone tech vented the Low side line into the air,


That's like a $10,000 fine.

Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5133838 06/14/19 06:09 AM
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Chris142 Offline
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We work on tons of crv's. The AC system in them is a terrible design. Hopefully you just need a clutch coil. The compressor is a scroll design. If a small piece of anything gets into the compressor it will lock it up. When it locks up it often blows a hole in the body.

Known in the industry as a "scroll with a hole".


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Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5133851 06/14/19 06:23 AM
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krismoriah72 Offline
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Look into 'black death'..

I would replace the compressor before this happens and you will have to replace everything.

Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5133867 06/14/19 06:46 AM
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mk378 Offline
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Check coil for continuity. Check for power supplied to the contact side of the relay. On most cars it is present even with the key off. Jump the contact side of the relay with the engine not running and see if the clutch pulls in. If you have to push on the clutch plate but then it will snap down, the gap is too wide.

Measuring the low side pressure with the compressor not running will tell you only one thing-- whether almost all of the refrigerant has leaked out. That will trip the switch and prevent the compressor from starting. A "green" reading on the gauge is actually bad in that situation. This is not explained in the directions on the side of the can. The pressure equalizes (rises) when the compressor stops, and it should read in the red if the A/C has been off for a time. This is also not explained in the directions on the side of the can. Getting the right amount of refrigerant in a car is not "1-2-3 easy." (and really, unless someone else had recently added some, why would anyone think the problem must be too much?) Once you fix the electrical or mechanical problem with the clutch, you will need to have the refrigerant removed and recharged by weight. That's the only way to be sure the amount is correct.

Last edited by mk378; 06/14/19 07:14 AM.
Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5133895 06/14/19 07:27 AM
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JeffKeryk Offline
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I got a 2007 CR-V for my twin grand nieces, who live in TX. AC is a must.
The AC was out; I had the entire system replaced; I forget exactly what that meant...
Maybe $1500? Lifetime warranty.
The AC is the Achilles heal of those otherwise great cars.

Good luck.

Last edited by JeffKeryk; 06/14/19 07:27 AM.

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Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5133978 06/14/19 09:50 AM
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exranger06 Offline
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I know the AC compressors are notorious for going out on the 2nd gen CR-Vs (2002-06), but I'm not sure it's still a problem on the 3rd gens. I had an '04 briefly that had a bad compressor, so I'm all-too-familiar with that problem. It got totaled before I got a chance to fix it.

I would check for 12V at the connector on the compressor first like Trav said. If there's no power, then it has nothing to do with the compressor or the clutch. If there IS power and the clutch still doesn't engage, then you DO have a problem with the clutch. You can even hook up some jumper wires and connect the compressor clutch directly to the battery and see if the compressor engages then.

If you're not getting power, you can jumper the low side pressure switch and see if the compressor engages then. If it does, you're either low on refrigerant or you have a bad switch. If it still doesn't engage, you might have a bad high-pressure switch (which you can also jumper/bypass to rule it out) or there's a wiring/electrical issue. You'd need a wiring diagram at that point to see how the circuit works and figure out where to check for power and ground.


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Re: 2007 Honda CR-V: AC stopped working [Re: krismoriah72] #5134041 06/14/19 11:47 AM
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Blurider24 Offline OP
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Originally Posted by krismoriah72
Look into 'black death'..

I would replace the compressor before this happens and you will have to replace everything.


This doesn't appear to apply here--the clutch won't even engage.


2007 Honda CR-V EX AWD 165k miles
----------------------------------------------------
Quaker State UD Syn 5w-20 (7-8k OCI)
Fram Ultra Synthetic (Every other OC)
Valvoline MaxLife ATF (Every OC)
Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5134077 06/14/19 12:45 PM
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Chris Meutsch Offline
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Could be as simple as the Thermal Overload Circuit which sits on the compressor......blew out twice on my 2001 Honda Civic.


2005 Honda CR-V EX, 278k
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