Air Conditioning problem
1996 Cadillac Deville V8 Front Wheel Drive Automatic 120000 miles
My brother and law has asked me to look at his Cadillac the A/C is not working. I do refrigeration in supermarkets, I do not usually work on cars. I could use some direction. This is what I have found so far.
On the dash the A/C controller will switch from heat to cool, but when you try to switch from Econ to Auto it will not. It always goes right back to ECON?
The system with nothing running static pressure is 120psi suc, and head, so I know we have some kind of charge in the system.
The LPS, and the HPS switches are all closed, but there are two other switches, they are on the liquid line, and it looks as if they are seperated by a metering device. I do not know why they are their, and I only have 4.9vdc coming to these switches when I unplug them and test.
Under the car on the compressor I do not have any power coming to the clutch.
I am not use to working on car units, and do not know if their is a control I missed to check, I find it odd the unit is stuck on the econ, becuase if it is like supermarkets we would be pulling outside air in and we would actually need automatic A/C on a hot pull down.
I would appreciate any direction. Thanks Tristan.
have the same problem?
Friday, July 3rd, 2009 AT 1:41 PM