I switched to heater for few days and now the AC does not work.


Asked by Feb 17, 2013 at 08:57 AM about the 2008 Ford Explorer Eddie Bauer 4WD

Question type: Maintenance & Repair

The Air Condition was working fine. I switched it to the heater for few days and now the AC does not cool . On checking I found that the compressor clutch does not get activated. heater is working fine. I understand the switch responsible for switching from AC to heater has got jamed . i am not able to trace it. I would appreciate if you could help me to solve it.

4 Answers


Under what circumstances does it not work? Is it freezing outside? If so the system might not activate to prevent water vapour freezing up and damaging the condensor. Also, did you have the system serviced at all? A low system pressure will also prevent the A/C from being turned on.


Thanks Lars. But outside climate is hot enough and AC is required. It was working fine just few days back until I switched it to heater. The compressor clutch does not activate as it does not get the power . I checked it with multimeter. All the fuses are ok. I appreciate your help.


Have the A/C system serviced to make sure there's enough refrigerant in the system for the low pressure switch to enable the clutch to be engaged. Nine times out of ten that's the problem (unless there's a problem with the switch itself).


Try tapping on the low pressure switch. It may be stuck. Also if you have an a/c switch on the dash try turning it on and off a few times. It might be stuck. HTH. -Jim

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