Problem with my 2001 Oldsmobile Aurora 3.5 v6.
Has new engine, cooling system, transmission (all from dealer under warranty.
My air conditioning system does not work. The the HVAC controls light up but the compressor does not engage. I checked all the fuses that I could find that are related to the HVAC system and they are all fine. Also under the front driver side carpeting, it is soaked with water. I don't know if this problem is related or not, but I thought maybe it could be a leak related to the evaporator.
I checked the R134 level and that seems fine. What i would like to know is first of all where I would be able to find the evaporator if you think that might be the issue(or at least part of it. Also what else should i be looking for to Diagnose and repair the problem. Could it be a relay and if so, how can I check to make sure it/they are working correctly? Keep in mind the compressor pulley is rolling it's just not engaging the system. I can't find any leaks anywhere else underneath the car or any funky odors. Thanks in advance for your help.
Did this A/C problem occur right after all the work to engine, etc. was done? If so, i would suggest calling the dealer and tell them that the A/C does not work since repairs were made. They should check it out for you for free. The mechanic may have just left something unplugged, or possibly pinched a harness.
If not, then i can get you a schematic to use with a test light and volt / ohm meter to assist in diagnosis. First, The A/C CLU fuse and the A/C CLU relay in the underhood fuse block are the first things to check. An easy way to check a relay is to swap it with another of same type and number of terminals with another in that fuse block.
There is also a pressure switch on the back of the compressor- Make sure that is plugged in. Also a pressure sensor on the line off the back of the compressor- make sure it is plugged in.
The Powertrain computer (PCM) controls the relay to engage the clutch when it is requested.I will send out a schematic if you would like.
2001 Oldsmobile Aurora A/C Compressor Won't Engage