# Audi a6.. heat AND airconditioning only work when foot on the gas or moving

**URL:** <https://community.cartalk.com/t/audi-a6-heat-and-airconditioning-only-work-when-foot-on-the-gas-or-moving/21861>\
**Category:** Maintenance/Repairs\
**Created:** [November 9, 2008, 2:39am UTC](https://community.cartalk.com/t/audi-a6-heat-and-airconditioning-only-work-when-foot-on-the-gas-or-moving/21861 "2008-11-09T02:39:01Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![joeobrien22](https://avatars.discourse-cdn.com/v4/letter/j/edb3f5/32.png) [@joeobrien22](https://community.cartalk.com/u/joeobrien22)\
**Post date:** [November 9, 2008, 2:39am UTC](https://community.cartalk.com/t/audi-a6-heat-and-airconditioning-only-work-when-foot-on-the-gas-or-moving/21861/1 "2008-11-09T02:39:01Z")

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I have a 98 audi a6 and my heat nor my air conditioning heat or cool unless the gas is revving and or moving… the blower works…but no heat or cool… help

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**Author:** ![mcparadise](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mcparadise/32/32_2.png) [@mcparadise](https://community.cartalk.com/u/mcparadise)\
**Post date:** [November 9, 2008, 1:43pm UTC](https://community.cartalk.com/t/audi-a6-heat-and-airconditioning-only-work-when-foot-on-the-gas-or-moving/21861/2 "2008-11-09T13:43:51Z")

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Some vehicles use vacuum motors to control the various flaps within the HVAC system. If your car has a vacuum leak the flaps won’t move correctly or stay in position. When you accelerate there is less vacuum, when you cost or idle at a light there is more, and the symptoms you describe could be caused by a vacuum leak.

If your Audi uses electric motors to move the flaps, then it’s not a vacuum leak.