Air from my heater doesn't blow warm air when sitting.

Asked by Dec 04, 2015 at 01:44 PM about the 2003 Mercury Grand Marquis LSE

Question type: Maintenance & Repair

I have a 2003 Grand Marquis.  Air from my heater doesn't blow warm air when sitting but when I'm driving the air is warm.  What is the fix?

2 Answers

104,335

The most common problem is low coolant and or air in the system, then a partially open thermostat. HTH

1 of 1 people found this helpful.
125

flush your heater core, if that don't work time for a water pump.

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