# VW Volkwagen 2011 Jetta 4-door Sedan AC Air Conditioner Issues

**URL:** <https://community.cartalk.com/t/vw-volkwagen-2011-jetta-4-door-sedan-ac-air-conditioner-issues/145438>\
**Category:** Maintenance/Repairs\
**Created:** [July 28, 2019, 4:15am UTC](https://community.cartalk.com/t/vw-volkwagen-2011-jetta-4-door-sedan-ac-air-conditioner-issues/145438 "2019-07-28T04:15:31Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![karlthekiefer\_155359](https://avatars.discourse-cdn.com/v4/letter/k/54ee81/32.png) [@karlthekiefer\_155359](https://community.cartalk.com/u/karlthekiefer_155359)\
**Post date:** [July 28, 2019, 4:15am UTC](https://community.cartalk.com/t/vw-volkwagen-2011-jetta-4-door-sedan-ac-air-conditioner-issues/145438/1 "2019-07-28T04:15:31Z")

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I have a VW 2011 Jetta 4-door Sedan. Air always comes in through the vents when the AC is on, but the problem is that sometimes it is cold, sometimes it is not. It is unpredictable and intermittent, but in a 1-hr drive, definitely there will be AC and just air. What could the be issue or how can I troubleshoot?  
Thank you.

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**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\
**Post date:** [July 28, 2019, 1:30pm UTC](https://community.cartalk.com/t/vw-volkwagen-2011-jetta-4-door-sedan-ac-air-conditioner-issues/145438/2 "2019-07-28T13:30:40Z")

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My guess is a blend door is sticking.

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**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:** [July 28, 2019, 3:40pm UTC](https://community.cartalk.com/t/vw-volkwagen-2011-jetta-4-door-sedan-ac-air-conditioner-issues/145438/3 "2019-07-28T15:40:20Z")

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That’s one indication of a faulty expansion valve at the evaporator.

Tester

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**Author:** ![madRiver](https://avatars.discourse-cdn.com/v4/letter/m/ecd19e/32.png) [@madRiver](https://community.cartalk.com/u/madRiver)\
**Post date:** [July 29, 2019, 11:12am UTC](https://community.cartalk.com/t/vw-volkwagen-2011-jetta-4-door-sedan-ac-air-conditioner-issues/145438/4 "2019-07-29T11:12:53Z")

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A simple guess a part without diagnosis is a likely under $20 AC relay that is working intermittently. You can change it out yourself. I have self fixed my Subaru and Acura exhibiting same symptoms for $10/each with that guess.

This guess only works if you are referring to temperature of the air coming thru vents.

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<div class="post-metadata">

**Author:** ![karlthekiefer\_155359](https://avatars.discourse-cdn.com/v4/letter/k/54ee81/32.png) [@karlthekiefer\_155359](https://community.cartalk.com/u/karlthekiefer_155359)\
**Post date:** [December 28, 2020, 4:27am UTC](https://community.cartalk.com/t/vw-volkwagen-2011-jetta-4-door-sedan-ac-air-conditioner-issues/145438/5 "2020-12-28T04:27:55Z")

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What/where is the blend door? Blend door sticking? I never heard of a ‘Blend Door’, can you please explain? Thank you

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<div class="post-metadata">

**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\
**Post date:** [December 28, 2020, 10:28am UTC](https://community.cartalk.com/t/vw-volkwagen-2011-jetta-4-door-sedan-ac-air-conditioner-issues/145438/6 "2020-12-28T10:28:06Z")

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Somewhere under the dashboard.  
That was just a guess on my part, Testor is much more knowledgeable than I. This is just a generic diagram.

 ![image](https://global.discourse-cdn.com/cartalk/original/3X/0/0/00af37baa72c20844e0bb56b040760c5045b13aa.jpeg)