Why my car is always overheating when i turned on the a/c?
I have 1994 honda accord exi and everytime I turned on the a/c for about an hour my engine overheat.
Your air conditioner, when it is turned on, draws a load from the engine. The engine is working to turn the pulley to drive the compressor and the load is not inconsiderable. A/C causes a significant loss in fuel mileage in most vehicles.
Anyhow, it sounds like your cooling system is not working efficiently. Fordetails visit…
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Like Alan says, check the fan, plus check coolant levels. Replace thermostat and radiator pressure cap. These are typical issues when cars overheat.
Also make sure your engine coolant is ok. I agree with Alan's post as well
When the ac is running., make sure the electric fan by the radiator is also running. If it is good. If not then you may have either a fan motor problem or heat sensitive sending unit problem. The sending unit is located somewhere on the engine. Follow the wires till you find it. Not a expensive repair. Screw the old one out. Screw the new one in. If you suspect the motor, run 12 volts directly to it from the battery. If it doesn't run then it needs to be replaced. Look around and you will probably be able to find used parts.
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