Heater Problem

5

Asked by Jan 03, 2017 at 11:35 PM about the 2002 Honda Civic EX

Question type: Maintenance & Repair

My car is blowing cold air. It wont blow hot air. It only
blows hot air when I accelerate the car. I had the water
pump and the thermostat change. Please someone tell
me what might it be. Thanks a lot

5 Answers

2,480

have you bled the cooling system?

1 people found this helpful.
85,525

Check the coolant level, it may be low. Cooling system would have needed to be bled when refilling the coolant or there would be air pockets in the cooling system causing erratic engine temperature readings, and no heat.

1 people found this helpful.
5

I try doing it but my fans didn't turn on. what might be the problem. And I know they work because when I'm driving I hear them and my temperature gauge was at normal.

85,525

Ok, the fans do nothing for purging the air out of the cooling system. The engine needs to run with the radiator cap off to operating temperature so the thermostat opens up. You have the heat set on hot so the coolant can circulate threw the heater core. Leave it run and add coolant when necessary, this will work the air out of the cooling system. You should start to fell heat coming out of your vents, then you know your good. Some cars are hard to bleed, sometimes they need to be brought to a shop. It helps to have the front end of the car elevated.

1 people found this helpful.
2,480

This Honda might have a bleeder niple where the top radiator hose meets the engine block, loosen up a bit with motor running, untill just coolant runs out clarify fans dont work

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