I HAVE CHANGED THE THERMOSTAT AND HEATING SENSOR ON MY 3.1 GRAN PRIX.BOTH HOSES ARE HOT WHEN I HAVE THE CAR RUNNING.I TURN ON THE AC AND THE FAN COMES ON,BUT WHEN I TURN ON THE HEATER THE TEMPERATURE STARTS TO GO UP.
2000 Pontiac Grand Prix • 160,000 miles
Changed thermostat,heating sensor and replaced the antifreeze.AC works but when I turn on the heater it starts to overheat.AC fan turns on and both hoses are hot.
March 6, 2012.
March 6, 2012.
did it overheat prior to this repair?? if it did, get a leak down test to verify the head gaskets are ok.
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