HELP... No A/C
Thread Starter
Le Mans Master
Joined: Aug 2001
Posts: 7,064
Likes: 18
From: Arizona
HELP... No A/C
Went to pick up my car from the body shop today (its been there for over a month)... When I went to press the A/C button the display lit the yellow light on the A/C button for a second then it turned off.
I checked the DIC.. no HVAC codes.
Its 108 in Phoenix today... I need some cold air...
Suggestions?
I checked the DIC.. no HVAC codes.
Its 108 in Phoenix today... I need some cold air...
Suggestions?
Last edited by ICULUKN-C5; Jun 17, 2011 at 06:17 PM.
Pro
Joined: Mar 2011
Posts: 720
Likes: 2
From: Walnut Creek CA
I'm not sure we have enough information to help with the diagnosis, but did you try scrolling through various modes (e.g. auto, defrost, lower vents, upper vents, etc.) on the system and then playing with A/C as you changed from one to the other?
Thread Starter
Le Mans Master
Joined: Aug 2001
Posts: 7,064
Likes: 18
From: Arizona
just tried every button... Sometimes the yellow LED on the A/C button will blink 3-5 times then turn off. Others times it just stays solid for 2-3 seconds then turns off.
Doesnt matter if the defrosters are on or not or what mode the vents are in.
Doesnt matter if the defrosters are on or not or what mode the vents are in.
Race Director
Joined: Aug 2003
Posts: 13,421
Likes: 8
From: Lake Mary Florida
Not much help but all the owner's manual says about that LED is it will flash when AC is not available.
When I read that I went well duh!
The FSM doesn't discuss the LED on the button.
General things, with the engine running and AC ON, if you look at the compressor, is it turning normally?
When I read that I went well duh!
The FSM doesn't discuss the LED on the button.
General things, with the engine running and AC ON, if you look at the compressor, is it turning normally?
Le Mans Master
Joined: Oct 1999
Posts: 6,366
Likes: 34
Not much help but all the owner's manual says about that LED is it will flash when AC is not available.
When I read that I went well duh!
The FSM doesn't discuss the LED on the button.
General things, with the engine running and AC ON, if you look at the compressor, is it turning normally?
When I read that I went well duh!
The FSM doesn't discuss the LED on the button.
General things, with the engine running and AC ON, if you look at the compressor, is it turning normally?
On "another car" the AC button going out was a result of the AC relay taking a dump.
the other thing suggested to look at was the refridge in the system. after filling it a little to a full system it was the relay.
I dont know if the C5 is the same. worth a look?
Thread Starter
Le Mans Master
Joined: Aug 2001
Posts: 7,064
Likes: 18
From: Arizona
I sent it to the body shop to get the fenders repainted (they had some rockchips)...
I also had the A/C belt replaced, however the mechanic told me that its an easy fix and he didn't touch anything except the tensioner.
Update.... I just went outside and started it.. .Pully seems to be turning as designed... no signs of slip
I also had the A/C belt replaced, however the mechanic told me that its an easy fix and he didn't touch anything except the tensioner.
Update.... I just went outside and started it.. .Pully seems to be turning as designed... no signs of slip
Last edited by ICULUKN-C5; Jun 17, 2011 at 07:47 PM.
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Thread Starter
Le Mans Master
Joined: Aug 2001
Posts: 7,064
Likes: 18
From: Arizona
Le Mans Master
Joined: Oct 1999
Posts: 6,366
Likes: 34
I dont have the AC belt on my car now. When I drive I can turn on the AC, and the AC thinks it is on. radiator Fans turn on, idle will go up. It stays lit for my whole hour drive, but there is no cold air.
Burning Brakes
Joined: Jun 2010
Posts: 1,014
Likes: 5
From: Rockwall TX
Yes, the one that plugs into the compressor. Also, comfirm that the clutch is actually engaging. One other item for Bill, if you don't have the belt on, there is no way you are going to get cold air, unless its cold out and the windows are down?
Last edited by dmarkshark; Jun 17, 2011 at 09:26 PM.
Race Director
Joined: Aug 2003
Posts: 13,421
Likes: 8
From: Lake Mary Florida
Thread Starter
Le Mans Master
Joined: Aug 2001
Posts: 7,064
Likes: 18
From: Arizona
Race Director
Joined: Aug 2003
Posts: 13,421
Likes: 8
From: Lake Mary Florida
It may be. Let's back track just a bit...was it working fine before having the belt changed?
You can go to most automotive stores and buy the recharge bottle. It's pretty straightforward and the fitting will only attach to the correct line. The low pressure is the one near the firewall. The procedure on the bottle will walk you through testing first to determine if it is low. Its temperature related as to how much pressure you have or should have.
If you are uncertain, take it to an AC repair shop.
If there is a leak they can use a sniffer and detect it.
You can go to most automotive stores and buy the recharge bottle. It's pretty straightforward and the fitting will only attach to the correct line. The low pressure is the one near the firewall. The procedure on the bottle will walk you through testing first to determine if it is low. Its temperature related as to how much pressure you have or should have.
If you are uncertain, take it to an AC repair shop.
If there is a leak they can use a sniffer and detect it.
Race Director
Joined: Oct 2004
Posts: 13,597
Likes: 1,353
From: Home of the VOLS ! Knoxville, TN. Tennessee
St. Jude Donor '11-'12-'13, '15, '16-'17-'18-'19
If was working before the belt change, then someone damaged your AC lines during the belt swap.
The control goes to orange and turns off when there is no refrigerant in the system or it's too low, no question about that.
You can try and buy a can of R134 witha guage on it, hook it up to the line and see what kind of pressure you have. if it's comletely evacuated, I would take the car to an AC shop. If it's just low, top it off to the green marks on the guage and the ac will turn on.
Slight possibility that the pressure sensor is bad also, I have had that happen. they are easy to replace.
The control goes to orange and turns off when there is no refrigerant in the system or it's too low, no question about that.
You can try and buy a can of R134 witha guage on it, hook it up to the line and see what kind of pressure you have. if it's comletely evacuated, I would take the car to an AC shop. If it's just low, top it off to the green marks on the guage and the ac will turn on.
Slight possibility that the pressure sensor is bad also, I have had that happen. they are easy to replace.
Race Director
Joined: Oct 2004
Posts: 13,597
Likes: 1,353
From: Home of the VOLS ! Knoxville, TN. Tennessee
St. Jude Donor '11-'12-'13, '15, '16-'17-'18-'19