2003 Town & Country. I get no heat and the temp gauge does not move off of cold. Occasionally after accelerating onto a highway the gauge moves and the heat comes up. Any ideas?
If the coolant level (antifreeze) level is low there may not be enough fluid in the system for the temperature sensor to register a proper reading ( think of it as holding an oral thermometer just outside of your mouth).
Insufficient fluid passing through the heater core (small fan that blows through a small heated radiator) may not be enough to produce heat.
However: At increased speeds the engine may be heating what little fluid there is to a point to supply heat to the heater core, and register on the temperature sensor.
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A word of caution though. NEVER open the radiator cap with the engine hot. Give it time to cool off and top off with the proper antifreeze at the correct mixture.
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Kindly let me know if I've helped in any way, with a good word or two.
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