Question about 2000 Mercury Grand Marquis
I have flushed the system and replaced the thermostat (twice to be sure) and blew water through the heater core. I still have no heat. I am wondering if the temperature control unit is not sending the signal to direct the airflow through the heater core. Does anyone have any ideas?
Are you shure that you dont have trapped air in the heater core? get a big funnel that will fit tightly in the radiator filler and fill with coolant and run the car to normal operating temp and watch for the level to drop or bubbles to evacuate into the funnel. on really stubborn air locks i have had to squeeze the hoses to pump water through the heater core.
Posted on Feb 11, 2009
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Posted on Jan 02, 2017
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