If there is no freon in the system, the compressor won't engage. If there is freon (proper amount) and it still doesn't engage, then there could be a power supply issue to the compressor, a low pressure switch which is bad. As far as getting heat into the vehicle, the blend air door must not be working and allowing heat to enter. Please keep in mind, if the blend door is stuck in the heat position, it doesn't matter how well the AC works. It won't blow cool air into the vehicle.
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Thursday, June 23rd, 2016 AT 7:23 PM