2001 Volkswagen Jetta Heater Stopped Blowing Hot Air Fix

123,000 MILES
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MSMJARRETT
  • MEMBER
  • 1 POST
My heater stopped blowing hot air.. How can I fix it??
Nov 11, 2012 at 3:35 PM
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EXOVCDS
  • ✓Experienced Mechanic
  • 1,882 POSTS
First make sure that your water pump is ok, since a bad pump will cause no heat due to lack of coolant circulation.

Bad sample:
http://www.youtube.com/watch?v=thcwatH_BpI&feature=plcp

Good sample:
http://www.youtube.com/watch?v=SJN3biTfdGE&feature=plcp

The other possibility is a broken blend door lever...stuck in the cold air position.

http://www.youtube.com/watch?v=6U9ZdkAjdhQ&feature=plcp

Look under the dash to see if your blend door lever is attached and moving.

Blend door foam coming off of the doors / flaps will also cause no heat symptoms.

Thomas
Nov 11, 2012 at 3:41 PM
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