The hvac on my 2500 hd 6liter is blowing hot air on the driverside and cold on the passanger side

SOURCE: Trail Blazer

One cause is that when filling the AC with freon, what happens is that people are not told to let the air out of the system and the can at the same time. So you fill your system to what you think it is full and it is really just full of air. The other is the relay is not opening fully. The other issue is the heater core is dirty and needs to be cleaned out with a jet of water

Harvey N Tawatao

• 3854 Answers
• Posted on May 31, 2009

SOURCE: AC does not work

Check the fuse for the A/C and try refilling the A/C with R134. You can buy the re charge kit at Auto Zone or Wal Mart, almost any Auto parts store. If the system is low on R134 the A/C compressor will not activate to keep it from burning out.
Try checking the fuse first then re charge the system with a can 12oz of R134. Just keep in mind not to over charge the system. Just follow the instruction and you'll be fine.
Keep me posted, be glad to help out.

Marty Johnson

• 72 Answers
• Posted on May 12, 2011

SOURCE: 2005 tahoe driverside a/c blows

I don't know but I have a 2007 tahoe that does the same thing. If you figuire it out, let me know. Been trying to fix that problem for some time now.

SOURCE: I have a 1999 corvette

The lighting for mode, fan speed, etc is not working, how do I fix?

Jim Goldsmith

• 2005 Answers
• Posted on Sep 30, 2013

SOURCE: heater/defroster blowing warm air on passenger

check the air actuator door hoses your under dash vent doors are not working