A/C compressor not clicking

[ernesto821]

Hi all,
the A/C relay is not clicking in my 2003 pontiac Grand AM 2.2L.. I checked the fuse and diode associated with the A/C both are fine. The relay also works when tested... Is there any other reason why the relay wouldn't click when I turn the A/C on?

thanks

[procaddytech]

There could be several other reasons. The BCM may not be getting the A/C request from the HVAC control assy. The PCM may not be getting the request from the BCM to ground the relay. The A/C pressure sensor may be reading less than 27psi or more than 432psi. (Low refrigerant charge or electrical fault) Ambient temperature sensor may be reading less than 38*F.

[thephantom1492]

There is also another reason: coolant temperature too hot (engine overheating)

The most likelly cause is a low refrigerant charge due to a leak.

Do NOT blindly refill the system, overcharging the system can/will cause compressor failure.

[xeroinfinity]

might also check other fuses associated with the fans and their relays