Question about 2005 Chevrolet Equinox

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The car is over heating while sitting still and is fine while in motion the fluids and belts are all good but I recently took it to an auto shop and they suggested that I replace the thermastate and the water pump what should I do?

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If the thermostat or water-pump were the issue I believe you would overheat regardless of driving or not. I would start with the electric cooling fan. Here is a couple things to check.

  1. Pop the hood and start the car.
  2. Turn the climate control to max A/C and verify the fan is running. (fan should automatically run when the A/C is activated) If it is not running then you have a faulty fan, fan relay, or wiring.
  3. If the fan comes on then shut off the A/C and let the engine idle normally. Keep an eye on temp and the fan should activate before the temp gauge goes into the red. If not then you may have a coolant temp sensor malfunction or possibly a computer malfunction (consider the computer as a very last resort because this is not likely).
What you are experiencing is low air flow across the radiator when sitting still and that is a direct indication of the fans operation. Hopefully this saved you some money and time before replacing those other components.

Posted on Mar 19, 2011

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I would check and make sure the cooling fan is operating,if not it will overheat sitting still.a thermostat will cause overheating whether or not it sits still or driving(more so when driving).the same if it has a bad water pump although it may circulate just enough coolant when driving to not overheat with air flow also adding a cooling effect.if you don`t have a leak then i would say the water pump is okay as they usually will leak before causing a overheat problem.make sure the cooling fan is working and the rad does not have anything stopping the air flow over the rad and is not stopping coolant flow in the rad.

Posted on Mar 19, 2011

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