1999 Chevy cavalier... overheating

1999 Chevy cavalier... overheating especially when idle. Air con works while car moves but cutsoff when at a stop more like blows hot air. I think it's my fan, but could it be the thermostat? My radiator fan does not cut on.

With the engine at idle, trans in park, turn on the air conditioner, open the hood behind (toward the rear of the car) the radiator there is a fan, it should be running if not then it could be a fuse, a bad relay or failed fan motor. You will have to diagnosis it. Get your fan working first but the thermostat could be a problem to seeing you may have overheated the engine.

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