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passenger vents blowing hot air??

03 tahoe on Wed June 16, 2010 10:29 PM User is offline

Year: 2003
Make: chevrolet
Model: tahoe z71
Engine Size: 5.3
Refrigerant Type: 134a
Ambient Temp: 75
Country of Origin: United States

03 Tahoe, center vent running around 46 deg. and drivers temp set at 72 deg. a little slow getting chilly, but catches up ok... then I notice hot air coming from the passenger side dash vents?? Actuator maybe?? rear air blowing cold. I need to check my low and high side since I just refilled the unit, by I havn't checked my readings since I refilled last week. where should they be standard? did put 43oz 134a back in and seems to be functioning fine till I notice the passenger side hot air. I did not notice it till today. It might have been doing it before, but I think it just started. any thought experts? thanks in advance... 03 tahoe

JACK ADAMS on Thu June 17, 2010 1:10 PM User is offline

Is this a dual zone system for the front air? Also it could have a leak, since you said you had to charge it. You didn’t say what repair had been performed for the re-charge.

03 tahoe on Thu June 17, 2010 4:29 PM User is offline

The system seems to be holding pressure well. I thought the system leaked down over time and I emptied and recharged the unit to be sure how much was in the system.
Drivers side and rear air are blowing cold... passenger is blowing hot.. the colder I set the passenger stat, the hotter it blows. ( it is a dual system)
Hope it helps...

robs on Thu June 17, 2010 4:50 PM User is offlineView users profile

sounds like it might be a blend door issue, maybe the actuator, if you checked for leaks and it checked out to be good.

03 tahoe on Thu June 17, 2010 7:54 PM User is offline

the blend door is up under the dash on the passenger side correct. It seems very simple to replace... do they go up often? is this a dealer item or should I pic one up off the net? thanks for all your help. this site has been very helpful!!

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