A/C Leak 2001 Expy
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Junior User
Joined: Aug 2004
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A/C Leak 2001 Expy
I can't locate the AC leak i even had Dye shot into the system but i can't see where it's leaking.Is there a common place that they leak.
When i turn on thew rear AC i get warm air but the front is cold,if i did have a leak where would i check first?Could any vacumn hoses cause freon leak?
Anybody--
When i turn on thew rear AC i get warm air but the front is cold,if i did have a leak where would i check first?Could any vacumn hoses cause freon leak?
Anybody--
Posting Guru
Joined: Oct 2006
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AC Leak? What leak?
Why do you think you have a freon leak? the front and back are on the same system. So if you had no refrigerant, the front would be hot too. I suspect you have a problem with your heet/cold temp selection switches or blend door in the left rear quarter panel area.
Hotshot
Joined: Jan 2004
Posts: 19,768
Likes: 1,082
From: St Louis
You have a temperature control problem with the rear system, not a refrigerant leak.
With or without sunroof? (yeah, it's important or I wouldn't have asked).
EATC or manual HVAC controls?
Steve
With or without sunroof? (yeah, it's important or I wouldn't have asked).
EATC or manual HVAC controls?
Steve
Last edited by projectSHO89; Aug 23, 2007 at 04:10 PM.
Senior User
Joined: Mar 2004
Posts: 219
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From: Grand Island, NY
Originally Posted by projectSHO89
You have a temperature control problem with the rear system, not a refrigerant leak.
With or without sunroof? (yeah, it's important or I wouldn't have asked).
EATC or manual HVAC controls?
Steve
With or without sunroof? (yeah, it's important or I wouldn't have asked).
EATC or manual HVAC controls?
Steve
Hotshot
Joined: Jan 2004
Posts: 19,768
Likes: 1,082
From: St Louis
Check to see if the symptom is the same whether using the front or rear controls (properly).
If the symptom is the same (no control over rear temp using either control):
a. Verify fuse F23 in the underdash fuse panel. If good, the problem may be a faulty auxiliary control module, auxiliary blend actuator, blend door, or other wiring or circuit fault. Possibly even fault thermostatic expansion valve on the rear AC evaporator.
b. If fuse is blown, replace it and see if it holds or not. If not, the short circuit will have to be isolated and corrected.
The diagnostics are not complicated, they primarily involve locating connectors and making resistance or voltage readings.
Steve
If the symptom is the same (no control over rear temp using either control):
a. Verify fuse F23 in the underdash fuse panel. If good, the problem may be a faulty auxiliary control module, auxiliary blend actuator, blend door, or other wiring or circuit fault. Possibly even fault thermostatic expansion valve on the rear AC evaporator.
b. If fuse is blown, replace it and see if it holds or not. If not, the short circuit will have to be isolated and corrected.
The diagnostics are not complicated, they primarily involve locating connectors and making resistance or voltage readings.
Steve
Fleet Mechanic
Joined: Feb 2006
Posts: 1,776
Likes: 5
From: Lorain County, Ohio
Originally Posted by projectSHO89
Check to see if the symptom is the same whether using the front or rear controls (properly).
If the symptom is the same (no control over rear temp using either control):
a. Verify fuse F23 in the underdash fuse panel. If good, the problem may be a faulty auxiliary control module, auxiliary blend actuator, blend door, or other wiring or circuit fault. Possibly even fault thermostatic expansion valve on the rear AC evaporator.
b. If fuse is blown, replace it and see if it holds or not. If not, the short circuit will have to be isolated and corrected.
The diagnostics are not complicated, they primarily involve locating connectors and making resistance or voltage readings.
Steve
If the symptom is the same (no control over rear temp using either control):
a. Verify fuse F23 in the underdash fuse panel. If good, the problem may be a faulty auxiliary control module, auxiliary blend actuator, blend door, or other wiring or circuit fault. Possibly even fault thermostatic expansion valve on the rear AC evaporator.
b. If fuse is blown, replace it and see if it holds or not. If not, the short circuit will have to be isolated and corrected.
The diagnostics are not complicated, they primarily involve locating connectors and making resistance or voltage readings.
Steve
Hotshot
Joined: Jan 2004
Posts: 19,768
Likes: 1,082
From: St Louis
Originally Posted by lsrx101
I'm curious. What difference does the sunroof make?
Steve
Last edited by projectSHO89; Aug 25, 2007 at 08:35 PM.
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Fleet Mechanic
Joined: Feb 2006
Posts: 1,776
Likes: 5
From: Lorain County, Ohio
Originally Posted by projectSHO89
Overhead control console, different wiring circuits... The EVTM has separate drawings for each configuration.
Steve
Steve
That's different controls for the rear, right? Now that you mention it, that sounds familiar.
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