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Q: Why does compressor engage during defrost?
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Why does the car turn off when the defrost is on?

If it has AC assist and the compressor is shot, cut the belt or disconnect the defrost from the compressor.


Why is it that your car's compressor keeps on running. It stops only if you will shut it off?

More than likely, your H-A/C control is set to Defrost. In most vehicles, when this is set to Defrost, the A/C Compressor runs continually.More than likely, your H-A/C control is set to Defrost. In most vehicles, when this is set to Defrost, the A/C Compressor runs continually.


Why is my 2003 trailblazer stalling while idle and heater is on?

If defrost is on it could be your compressor going bad. See what happens when you leave off defrost or disconnect your compressor. It only controls defrost and air conditioning. I had the same problem


Why do you keep blowing fuses when you turn on the heater fan but when you take out the compressor fuse it doesnt blow the fuses?

The compressor is coming on because you have the heater set to defrost. Take it off defrost and the compressor will not come on. I would suspect the compressor is locked up.


Jeep air condition compressor kicks on and off when off?

Compressor will normally run when in defrost mode.


Power steering belt squeals when defrost is on?

Tighten the belt. The belt drive the AC compressor. On some cars the compressor engages when the defrost is on to remove moisture from the air before it's heated for the defrosters.


2008chevyimpala ac still clicks after it gets turned off?

Did you happen to move it to Defrost when you turned it off? The ac compressor also runs in the defrost cycle to keep the seals lubricated during the winter months when the ac is not used.


What would cause engine to make noise when defrost is turned on?

The A/C system compressor operates when in the defrost mode. If the noise is also heard when running the A?C it is more than likely a problem with the compressor/pulley.


Is it normal for the AC compressor to turn on and off when running the heater on a 2000 Chevy 2500 6.0 engine?

YES. The A/C will cycle on and off when the heater is on defrost. That stops the A/C compressor from locking up during the winter months.


How do you recharge the ac on a 1995 Mazda MPV if the compressor won't engage how do you make it engage?

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Should ac compressor stay on when heater control moved to defrost in a 2000 durango?

Yes, the ac will run in the defrost position to dry the windshield.


What happens if the electrical connector is not connected to the ac compressor?

The a/c clutch will not engage and the compressor will not come on.............