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Heat only works when driving - '05 Elantra

4K views 11 replies 5 participants last post by  secutanudu 
#1 ·
Any ideas? When I parked and idle, the air blowing out of the vents goes cold. If I drive or rev the engine, I get hot air.


Thanks.
 
#8 ·
I just popped the hood and checked the coolant level...looks way low. What would cause this, is it an indicator of another problem? In any case, I will buy coolant tomorrow to top it off. I've never bought coolant, what type do I get, or is there no choice?
 
#12 ·
I bought it new, never overheated before.

I also realized, after talking to someone at work, that filling the overflow tank with coolant doesn't do much....I didn't know enough to fill the radiator directly (after letting the car cool down).

I'll be doing that tonight.
 
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