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You did not connect the proper switch wire

How to change the backup light switch on a 1996 celica?

The reverse valve is probably stuck, hit it lightly with the butt of a screw driver and hope it get loose, also check to see if there is a fuse by the auxiliary heat side, make sure that is...

The fans can be on inside and out but if the compressor is not running it won't cool,get the compressor to work and check the freon..

If you r low on freon, chances are the cool line will be frozen solid, need to shut down the unit and let it defrost, also check the braker to the outside unit, sometimes it trips and can't ...

If you have a heat pump unit it, maybe the reverse valve is stuck on heat, reversing the process.Tap it lightly with the butt of a screw driver and put the thermostat on cool.That maybe ...