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2004 Nissan Maxima SE 4dr Sedan Auto

2004 Nissan Maxima
Trim Info:
Front Wheel Drive, 4 Door Sedan, Mid-Size
20 mpg city / 28 mpg hwy
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January 24, 2013, 9:41 am

Paula M

Question: Heat was not working while car idleing or when stopped, why?

Had radiator charged and coolant system flushed, had heater core flushed. Still did not fix. Had the heater core replaced, still not working. Could it be some sort of sensor???

January 26, 2013, 9:08 pm

Ron W
Expert Mechanic

Sounds like a coolant flow issue across the heater core. Possibly trapped air bubble in the cooling system. At higher speeds you have more flow, so it may have enough coolant flowing to warm the passenger compartment, but at lower speeds there isn't enough for the heater to work well.

You should have the cooling system bled.

BE careful! As hot coolant can cause severe burns. If you're not sure how to do this procedure, please have a qualified mechanic perform it for you.

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