Question about 2003 Chrysler PT Cruiser

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Car is overheating. Flushed three times--no improvemrnt. Can run pretty well with heater on and windows open. Doesn't heat up at idle speed. Someone suggested a loose fan belt but it is hard to find.,,Any ideas?

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There are 3 common reasons for a car over-heating:

  • lack of coolant due to a leaking radiator hose
  • clogged thermostat-fails to open to allow more coolant from entering the the system
  • bad water pump- although most bad water pumps tend to leak, it's possible to have a bad bearing inside the water pump which in turn would fail to adequately circulate coolant

Posted on Mar 13, 2011

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Posted on Jan 02, 2017

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The heater stopped working because there was no coolant in it. Your real question is where is the water going.

Have the cooling system pressure tested to be sure you have no leaks. You said you had the radiator flushed, I suspect some of the tubes are blocked, it should be dissassembled and rodded then cooked out. Not just flushed. You problem is in traffic, low speed. The car starts to over heat, it blows the water out of the overflow, the level is down, the heater stops working, then you are out of water in the engine and overheating.


BTW ground the wire that goes to the warning light sensor and be sure it lights the warning light. If htis is the case the sensor is bad. I assume when you turn the key on but before starting the light does work then, correct? That means the bulb is ok, that does not check the sensor.

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