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2005 Chevy Suburban Air Coinditioning

Tiny
PTCASSIDY
  • MEMBER
  • 2005 CHEVROLET SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 71,000 MILES
I just reconnected my battery (after replacing a speed sensor), the A/c didnt work - it blew air only from the defrost, not the front vents. After a restart it now blows cold air from the driver's side vents, but HOT air from the front passenger's vents.
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Wednesday, September 1st, 2010 AT 5:32 PM

1 Reply

Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
If it worked fine prior, try this actuator recalibration procedure.

Important: Do not adjust any controls on the HVAC control module while the HVAC control module is self-calibrating. If interrupted, improper HVAC performance will result.

Alternate Method (w/o Scan Tool)
Clear all DTCs.
Place the ignition switch to the OFF position.
Install the HVAC actuator.
Connect all previously disconnected components.
Remove the HVAC/ECAS fuse for a minimum of 10 seconds.
Install the HVAC/ECAS fuse.
Start the vehicle.
Wait 40 seconds for the HVAC control module to self-calibrate.
Verify that no DTCs have set as current DTCs.
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Wednesday, September 1st, 2010 AT 9:51 PM

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