Anyone else have this problem? Heater works perfectly fine, but then at a stoplight, it starts blowing cool air. It's my wife's car, so I don't drive it everyday, but I know it didn't used to do it.

 

Air bubble in the coolant lines. Has any work been done on the car that required a fluid flush / change/ top off?

 

+1 ^^^^ Check the coolant level.

 

Nope. No work done at all. I'll check the level, but I wouldn't think any impact on the heater should be felt at coolant levels that are sufficient enough to keep the coolant indicator light from coming on. Although, I do occasionally hear coolant "swooshing" when I first accelerate from a stop. Anything else?

 

+2 your coolant is low and has an airpocket.

 

airpocket, been there before

 

OK...seems like airpocket is the consensus. Is there a method for "burping" the coolant system, or just add coolant?

Alty - you had the same problem?