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-   -   Heat only works when driving - '05 Elantra (http://www.diychatroom.com/f46/heat-only-works-when-driving-05-elantra-88689/)

secutanudu 12-05-2010 11:22 AM

Heat only works when driving - '05 Elantra
 
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.

Rehabber 12-05-2010 11:41 AM

What year/make/model car? If your system controls are vacuum controlles, you may have a damaged/rotted vacuum hose/s.

secutanudu 12-05-2010 11:45 AM

It's a 2005 Hyundai Elantra.

PAbugman 12-05-2010 05:03 PM

Check simple stuff too,-in my company truck the water pump was leaking. When the coolant level went down, I couldn't get much heat, so check the coolant level.

Know It ALL 12-05-2010 07:25 PM

Quote:

Originally Posted by PAbugman (Post 546069)
Check simple stuff too,-in my company truck the water pump was leaking. When the coolant level went down, I couldn't get much heat, so check the coolant level.

Ditto, Same here.
Do you sometimes hear gurgling sounds in the dash?

secutanudu 12-05-2010 07:25 PM

I'll check the coolant tomorrow, thanks. The engine temp on the dashboard gauge is normal (just under halfway), if that means anything.

secutanudu 12-05-2010 07:34 PM

Quote:

Originally Posted by Know It ALL (Post 546182)
Ditto, Same here.
Do you sometimes hear gurgling sounds in the dash?


Can't say I have...

secutanudu 12-05-2010 08:11 PM

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?

polarzak 12-06-2010 05:38 AM

You seems to have a leak somewhere. Look for green or red drips around the engine or on the driveway. The kind you need is sometimes vehicle specific, so check your owners manual or it maybe even be on a sticker on the filler neck.

secutanudu 12-06-2010 06:31 AM

I did buy some and fill it, it wasn't as low as I thought. Used maybe 1/8 gallon to get fill it.

In any case, didn't fix the problem....

Know It ALL 12-06-2010 09:45 AM

How long have you owned this car and has it ever overheated? Possible head gasket blown.

secutanudu 12-06-2010 10:13 AM

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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