Having problems with your 2002 Mercury Grand Marquis ?

Air conditioner compressor will not turn off.

\015 The ac compressor constantly runs.\015 Posted / edited by AnonymousUser on : 22-04-2019

Answers :

The low pressure switch cuts power to the compressor if the pressure drops below 20psi such as when the system is low on freon.
If the compressor runs with the HVAC system in the off position, you would check for a stuck relay, or a short where the compressor clutch is getting power from another source.
But is idling or blows cold air,
Repair Help & Product Troubleshooting for 2002 Mercury Grand Marquis

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