No bi-level or defrost. Floor ok. Heat, AC, blower speeds otherwise fine.

Assume blue vacuum module mounted under hood, passenger side, near fender.

Comments welcome for head start before heading out to repair in wet weather.

 

Are you talking about an HHR? A) mine has no blue vacuum module B) the HVAC control doors are electronic, not vacuum.

 

sorry to bring this thread up from the grave but i am having the same issue. Mine works from defrost to floor both heat and a/c but nothing in the middle vents. The window vents do work (the small non adj. ones) I have a 07 lt

 

No need to apologize for bringing a thread back from the great beyond, it sounds like you either have stuck blend doors or a broken actuator.

Give this thread a read.....

https://www.chevyhhr.net/forums/problems-service-repairs-42/heater-problem-33767/

P.S. to the forum!

 

Sounds more like "mode" switch or door than "temp".