Question about 2002 Chrysler PT Cruiser

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I have a 2002 pt cruiser with a 2.4 L engine. I have a overheating problem. Per the Hanes Manual. I have replaced the water pump, thermostat,low relay switch,Radiator cap, and temperture sensor.and have checked the fan in which is good. the only problem I've found is if I disconnect the wire from the temperture sensor, the light on the dashboard will turn on, otherwise if connected there is no light on the dashboard indicator. this is the light that should go on if the temp gets too hot. but should turn on when you first turn the ignition on to let you know the bulb is good and the system working. the book says a possible open circuit..where? or is there any other way that this isn't working?

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  • Michael Gallegos Oct 10, 2009

    I will try flushing the system, and I need to look at the schematic to check for open curcuits..Thanks

  • Michael Gallegos Oct 11, 2009

    thank you

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  • Master
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When unplugging the wire from the temp sensor you should have an open circuit. The temp sensor once it detects a high temperature, would create an open circuit and the fan should turn on. I would say that the temp sensor is good, also you mentioned that you have replaced it. This most likely is a wiring issue. The tricky part is locating the problem. You will have to trace the wire from the sensor towards the harness to identify any bad wires or open connections.

Posted on Oct 10, 2009

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  • Master
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You don't have an open circuit, that is evident when you remove the wire and the lamp goes on.

Do you have an overheating problem or was your problem the temp gauge all along?

Buy a flush kit and flush the cooling system, it may be clogged

Posted on Oct 09, 2009

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====
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====
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