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2007 Honda CR-V: AC stopped working #5133754
06/14/19 02:05 AM
06/14/19 02:05 AM
Joined: Jan 2019
Posts: 50
Roaming the US
Blurider24 Offline OP
Blurider24  Offline OP

Joined: Jan 2019
Posts: 50
Roaming the US
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 159k miles
----------------------------------------------------
Quaker State UD Syn 5w-20
Fram Ultra Synthetic
Honda DW1 to Valvoline SynHM--2 drain/fill @ 147,400 & 148,100
Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5133757
06/14/19 02:34 AM
06/14/19 02:34 AM
Joined: Aug 2004
Posts: 20,888
CA
The Critic Offline
The Critic  Offline

Joined: Aug 2004
Posts: 20,888
CA
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.


2011 Toyota Prius 1.8L - 193K - Idemitsu ZEPRO Adv. Moly 0W-20
2007 Honda Accord 2.4 - 137K - Mobil 1 EP HM 5W-30
Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5133768
06/14/19 03:52 AM
06/14/19 03:52 AM
Joined: Aug 2009
Posts: 2,421
PA
Gasbuggy Offline
Gasbuggy  Offline

Joined: Aug 2009
Posts: 2,421
PA
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 04:17 AM
06/14/19 04:17 AM
Joined: Jan 2019
Posts: 50
Roaming the US
Blurider24 Offline OP
Blurider24  Offline OP

Joined: Jan 2019
Posts: 50
Roaming the US
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 04:19 AM.

2007 Honda CR-V EX AWD 159k miles
----------------------------------------------------
Quaker State UD Syn 5w-20
Fram Ultra Synthetic
Honda DW1 to Valvoline SynHM--2 drain/fill @ 147,400 & 148,100
Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5133777
06/14/19 04:53 AM
06/14/19 04:53 AM
Joined: Sep 2011
Posts: 16
CA
grjr Offline
grjr  Offline

Joined: Sep 2011
Posts: 16
CA
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 05:19 AM
06/14/19 05:19 AM
Joined: Nov 2006
Posts: 22,037
MA, Mittelfranken.de
Trav Offline
Trav  Offline

Joined: Nov 2006
Posts: 22,037
MA, Mittelfranken.de
Did you check for 12v at the compressor itself, power on A/C on?


ASE L1, Master. Deutsch Meisterbrief.
Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5133817
06/14/19 06:30 AM
06/14/19 06:30 AM
Joined: Feb 2016
Posts: 736
GA
miden851 Offline
miden851  Offline

Joined: Feb 2016
Posts: 736
GA


2008 Mazda6i GT; @223K miles
2016 Honda CR-V EX-L; @45K miles
Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5133827
06/14/19 06:55 AM
06/14/19 06:55 AM
Joined: Apr 2010
Posts: 1,746
Suburban Washington DC
atikovi Online content
atikovi  Online Content

Joined: Apr 2010
Posts: 1,746
Suburban Washington DC
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 07:09 AM
06/14/19 07:09 AM
Joined: Jun 2003
Posts: 19,206
Apple Valley, California
Chris142 Offline
Chris142  Offline

Joined: Jun 2003
Posts: 19,206
Apple Valley, California
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 07:23 AM
06/14/19 07:23 AM
Joined: Feb 2009
Posts: 1,929
wv
krismoriah72 Offline
krismoriah72  Offline

Joined: Feb 2009
Posts: 1,929
wv
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 07:46 AM
06/14/19 07:46 AM
Joined: Sep 2015
Posts: 1,945
USA
mk378 Offline
mk378  Offline

Joined: Sep 2015
Posts: 1,945
USA
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 08:14 AM.
Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5133895
06/14/19 08:27 AM
06/14/19 08:27 AM
Joined: Jan 2010
Posts: 1,705
Los Gatos, CA
JeffKeryk Offline
JeffKeryk  Offline

Joined: Jan 2010
Posts: 1,705
Los Gatos, CA
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 08:27 AM.

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Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5133978
06/14/19 10:50 AM
06/14/19 10:50 AM
Joined: Jan 2008
Posts: 4,189
Guilford, CT
exranger06 Offline
exranger06  Offline

Joined: Jan 2008
Posts: 4,189
Guilford, CT
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 12:47 PM
06/14/19 12:47 PM
Joined: Jan 2019
Posts: 50
Roaming the US
Blurider24 Offline OP
Blurider24  Offline OP

Joined: Jan 2019
Posts: 50
Roaming the US
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 159k miles
----------------------------------------------------
Quaker State UD Syn 5w-20
Fram Ultra Synthetic
Honda DW1 to Valvoline SynHM--2 drain/fill @ 147,400 & 148,100
Re: 2007 Honda CR-V: AC stopped working [Re: Blurider24] #5134077
06/14/19 01:45 PM
06/14/19 01:45 PM
Joined: Feb 2006
Posts: 2,763
Cincinnati
Chris Meutsch Offline
Chris Meutsch  Offline

Joined: Feb 2006
Posts: 2,763
Cincinnati
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, 273k
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