My A/C is "In a coma"...

[Silver Bullet]

OK... I have an A/C problem, and have absolutely no idea why!!! I have a brand new A/C compressor-Clutch, Full freon, Brand new climate air control, Brand new belt,and my mechanic says all the switches seem to be fine... His words were " Everything checks out fine, your problem is in the dash (SOMEWHERE)... Has anyone else had a similar problem, or has my SHO finally kicked my a$$ with a problem that I may never solve?? Like the old saying goes "Just when I thought I had all the answers, Someone changes the question" Well... I guess I have to look on the bright side... My A/C doesn't work, but I took a GTP for a walk earlier this evening If anyone has an idea, I would really appreciate it!! Take care...

 

[sdpatt]

Other than saying that your A/C doesn't work, you provided no symptoms for us to help you diagnose your problem. Kinda vague.

 

[rangerj]

I need more information in order to offer any intelegent suggestions. What is working, and what is not?

OK you have a new compressor and clutch, and the system is charged with refrigerant (generically FREON). Is the clutch engaging? Is the compressor being turned by the clutch? I'll assume these are both happening.

When you say the A/C is not working do you mean that you are not getting cold air, or that the blower motor is not working?

What were the pressure readings for the suction (low pressure) side of the A/C system? What was the high pressure side pressure reading?

You replaced the compressor, did you replace the filter/dryer? Was the rest of the system flushed out? What kind of "freon" was put in the system?

R-12? R-134a?

We need more information. Then we will sort it out. rangerj

 

[projectSHO89]

In addition to the questions Scott and rangerj posted..

Where in MO are you? I'm in N St Louis County.

If your mechanic said what you quoted him as saying, it would seem that he is reluctant to pull out a schematic and actually troubleshoot your problem, which, based on your description of the work performed, is likely electrical.

The electrical portion of the A/C system on the SHOs is actually very simple. A couple switches, a relay in the relay module, and a clutch is it for the most part, all controlled by the PCM or the EATC.

Steve

 

[Silver Bullet]

Sorry Guys... My brain was in a coma. The symptoms are this---> Clutch is engaging, When I hit my MAX AC button the fan fires right up and goes full blast but there is just warm air coming out the vents!! Every button on the climate air control works perfectly. Don't know why it has warm air, there is no reason it should at all!!

 

[projectSHO89]

Of course there's is a reason it's warm: Something is broken!

If you are positive the compressor clutch is engaging, you are left with two possibilities:

1) There is somehing wrong in the refrigerant loop so that that refigerant is not properly flowing. Feel the lines at the firewall. The line connected to the receiver/dryer (accumulator) should be much colder than the other line. If it is, that means the AC system is working.

2) If you determined that the AC system was workin in step 1 above, you likely have a problem in the heater blend door mechanism (or its control electronics).

Still need to do more troubleshooting. Don't jump to any conclusions, apply logic to the problem and determine what is working properly and what is not.

Hook up a set of AC guages and monitor them when the compressor clutch energizes. Report the numbers that you get.

FWIW, the cooling system fan is supposed to come on at high speed whenver the A/C is turned on. That is an electrical circuit that is not dependent on the AC system itself, but is controlled by the PCM when AC is selected by the driver. At least you know that that is working.

Steve

 

[jelloslug]

Do any of the A/C hoses under the hood get cold to the touch when you turn the A/C on?

 

[sdpatt]

If the compressor clutch is engaging, the cycling switch is finding at least the minimum refrigerant pressure in the system - that is, unless the switch has been bypassed (which is a threat to the health of the compressor). If the lines are getting hot/cool from the compresor operation, there must be a problem with the airlfow through the evaporator coils under the dash. Somehow, I don't think that is the problem. Need more info.

 

[91 SHOplus]

Did you run the self-check as described at Shotimes.com? If not, read on....

ELECTRONIC CLIMATE CONTROL - SELF DIAGNOSTIC TEST
The control assembly will detect electrical malfunctions occurring during the self test.

1. Make sure the coolant temperature is at least 120F (49C).

2. To display error codes, push the OFF and FLOOR buttons simultaneously and then the AUTOMATIC button within 2 seconds. The test may run as long as 20 seconds, during which time the display will be blank. If the display is blank for more than 20 seconds, consult the No Error Code Found Diagnosis and Testing chart.

3. The Self Diagnostic Test can be initiated at any time with the resulting error codes being displayed. Normal operation of the system stops when the Self Diagnostic Test is activated. To exit the self test and restart the system, push the COOLER button. The self test should be deactivated before powering the system down.

ERROR CODE KEY
Code Condition
1. Replace control head
2. Blend door problem
3. In-car temp sensor open or short
4. Ambient temp sensor open or short
5. Sun load sensor short
6. 888 Test complete - no failures (all segments on)

 

[Rio]

rangerj..."INTELEGENT"....HAHA...That was kwality....lol

wink

 

[dunndt]

i had that problem mine was a blend door problem