Question about 1999 Ford Crown Victoria
Trying to figure out what controls the power source that sends power to the a/c compressor. My compressors has no power to it
The A/C pressure switch along the low pressure side if the right amount of pressure in the system will be at a close circuit sending signal to the A/C clutch realy's which sends power to the A/C clutch to engage when prompted by the heating and cooling system in the dash. If the A/C system is low on R134a, the system will not work since there is not enough pressure for the pressure switch to have a close circuit. The pressure switch should be along the low pressure side on the line of on the Air Dryer, ( Looks like a silver cylinder ) Check the fuse box under the hood close to the battery, there should ne a high amp fuse for the A/C and the relay's may be in there too. Good luck and hope this helps. Keep me posted , be glad to help.
Posted on Jun 23, 2009
First check the fuses, then check if you have enough freon in system. If there isn't enough, the "LP Switch" - a switch on the suction side (thick pipe on compressor) will not switch the system on, it is there to protect the compressor. Have some freon put in, if it works and a few days / hours later it doesn't work, then you have a leak on the system.
Posted on Jun 23, 2009
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Posted on Jan 02, 2017
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