A/C problem

[Hola]

Our 93 LeSabre Custom's AC is a problem that we cannot understand. It works fine one momenta and the next it does not. Sometimes it starts working and then it blows warm air, and if we stop the car and then start again the airs starts cool again. Any ideas would be greatly appreciated.

[imidazol97]

Originally Posted by Hola

Our 93 LeSabre Custom's AC is a problem that we cannot understand. It works fine one momenta and the next it does not. Sometimes it starts working and then it blows warm air, and if we stop the car and then start again the airs starts cool again. Any ideas would be greatly appreciated.

Had a 93 with the Manual air conditioning. It has a relay on the relay center in front of the firewall and that relay turns the compressor on and off. So it cycles all the time. The car got so the air could come out warm and cut back to cold.

One day it just quit. The relay had burned points making poor contact. It's easily tested because most of the relays are the same part number. There are some for the cooling radiator fans, high speed blower motor, etc. I don't recall which one is the AC compressor relay. To remove use a knife blade underneath to lift the tang that sticks down and catches when the relay is slid in so that it can't work its way back out.

It may be the one all the way at the left of the relay center, looking at it from the front of the car.

[jconatser]

Here's the relay layout of my 95 LeSabre, maybe yours is the same:

[imidazol97]

Great post on the picture of the relays.

I switched the horn relay and the AC relay and it worked. I also verified poor contacts with an ohmmeter.

Good luck.

[spinne1]

Originally Posted by Hola

Our 93 LeSabre Custom's AC is a problem that we cannot understand. It works fine one momenta and the next it does not. Sometimes it starts working and then it blows warm air, and if we stop the car and then start again the airs starts cool again. Any ideas would be greatly appreciated.

In addition to a bad relay, you could have an incorrect amount of R134a (or R12), or moisture in the system, or a failing compressor, or a condensor that has several bent fins or an internal blockage (or your orifice tube could be clogged with gunk).