A/C Problems

[cope247]

Hi everybody. I was hoping to get some imput on why my a/c is not working. I think I know but I want some re-assurance. My clutch and my pulley on the original a/c compressor was bad so I got a refurb installed but waited on the evac and recharge because money was tight. Today I just had it evacuated and recharged with 2 pounds of r134a. The tech said that it is holding excellent pressure and there wasn't any leaks. The only problem is, from what he told me, was that the a/c compressor is not working properly. He hooked it up electronically to see what was going on. The fuses were ok, the a/c low pressure switch was good as well as the high pressure switch. But the problem he said he ran into was that the constant controle relay module (CCRM) could be defective. I'm not too sure where the CCRM is located but i think its the small black box located just above the radiator underneath the plastic protective lip right on top.? My question is, do I need to just replace the ccrm or do I need to replace the main climate control unit???? I can run the heat up to high and get hot air, I can run it at low setting, 60 degrees, and get the fresh air from the vents, and I have no problems with changing the fan speeds from high to low. So what do you suppose the problem could be??? Any help would be greatly appreciated. This is my third SHO and I have never ran into any a/c problems before. Thanks so much for your time,-Cory

 

[DHMag]

if youre not getting an error message from the EATC, then it is working properly. there is a self test you can perform on the EATC, its guidelines are laid out in the Chiltons manual.

these compressors (Nippondenso 10P15(x) series) are excellent compressors but do not like high RPMs at all. the Nippondenso 10P15(x) compressors have a max speed of 5000-5500RPM.

its not uncommon for the CCRM to cause a relay controlled problem. swap it out with an identical letter unit and give it a whirl.

has the orifice tube been changed ?