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Heating AC and Engine Cooling
Geo Prizm
Jeep Grand Cherokee Laredo

Would a defective thermostat on a 1993 GEO Prizm cause low readings on the temperature gauge and little heat in the car?

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2005-07-29 12:48:19
2005-07-29 12:48:19

Yes! Thermostat stuck open. Replace thermostat. It could, but the thermostat is normally open when the engine is warm so you should only notice this when the engine is cold or warming up.

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