IF you're not using it, you should be fine. You can use the fan and the heater, but the AC and defroster will actuate the compressor. You can unplug the compressor if you need to use the defroster. On the compressor, you will find a power supply to it. Just disconnect it.
Let me know if you have other questions.
Joe
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Friday, February 26th, 2010 AT 2:27 PM