.

Correspondingly, how do I know if my AC pressure switch is bad?

The most common symptom of a bad AC pressure switch is most likely that you will notice that the AC compressor is cutting on and off rapidly when you are idling your car. These switches between on and off can be noticeable on the engine's rpm, and you may see or feel fluctuations from it.

Similarly, how does a trinary switch work? The trinary switch is located in the a/c refrigerant line near the car's radiator / condenser. It senses the pressure of the refrigerant when the air conditioning compressor is engaged (running). The trinary switch is set to operate at three a/c refrigerant pressures: about 30 psi; about 190 psi; about 400 psi.

Then, should both fans be on when AC is on?

Both radiator fans should always run when the AC compressor is engaged. Both radiator fans should always run when the coolant temperature sensor in the bottom tank of the radiator reaches about 212*F.

How do I fix my AC pressure switch?

1. Step 1: Locate the A/C pressure switch.
2. Step 1: Disconnect the negative battery cable.
3. Step 2: Remove the switch electrical connector.
4. Step 3: Remove the switch.
5. Step 1: Install the new switch.
6. Step 2: Reinstall the electrical connector.
7. Step 3: Reinstall the negative battery cable.
8. Step 4: Test the A/C.