# Heat Only Works When **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** heating, airconditioning\ **Created:** [November 8, 2007, 6:11pm UTC](https://community.cartalk.com/t/heat-only-works-when/7027 "2007-11-08T18:11:24Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![TomScholfield](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tomscholfield/32/5681_2.png) [@TomScholfield](https://community.cartalk.com/u/TomScholfield)\ **Post date:** [November 8, 2007, 6:11pm UTC](https://community.cartalk.com/t/heat-only-works-when/7027/1 "2007-11-08T18:11:24Z")
Hi Everyone, I have a 2004 Hundai Elantra and it has 70,000 miles on it. The heat only seems to work if my foot is on the gas. I don’t have to be moving. If I am parked and I don’t have my foot on the gas then just cold air comes in. If I put my foot on the gas when I am parked and rev the engine a tiny tiny bit the heat begins to work. Any suggestions? ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [November 8, 2007, 10:44pm UTC](https://community.cartalk.com/t/heat-only-works-when/7027/2 "2007-11-08T22:44:41Z")
Have you checked the coolant level? Tester ---
**Author:** ![MrPhil](https://avatars.discourse-cdn.com/v4/letter/m/ecccb3/32.png) [@MrPhil](https://community.cartalk.com/u/MrPhil)\ **Post date:** [November 9, 2007, 2:02am UTC](https://community.cartalk.com/t/heat-only-works-when/7027/3 "2007-11-09T02:02:19Z")
Another possibility is that there’s a vacuum leak. Most cars operate the “doors” (gates) within the heating and ventilation ductwork by means of engine vacuum, and you’re not getting sufficient vacuum at idle. Take a look-see at the vacuum lines in the engine compartment for damage or leaks. I think one end will be at the intake manifold and the other end disappearing into the firewall somewhere.