Auto Air Conditioning & Heater Repair: 96 gmc a/c, vacuum hoses, r 134


Question
QUESTION: new compressor,drier,synthetic r-134, compressor work,runs 50psi, drier gets very cold but hot air inside whats up?

ANSWER: Hi Shan

Check your heater door operation.  Move the nob from blue to red and see if it changes temp.  If it does not change you may have a problem with the actuator if it is automatic temp. control.  You may want to disconnect your battery with ignition off wait 10 sec. and reconnect battery/  When you turn engine on if it is electronic temp. control the system may reset itself.  If it is manual temp. control it works with vacuum from the engine.  Check all vacuum hoses and repair if needed.  Let me know if I can be of any help.

---------- FOLLOW-UP ----------

QUESTION: I done everything you ask, some thing to do with the blending door. how do I get to this with out tearing out the dash
and having to mess with the air bags?       shan

Answer
HI Shan

Airbags are not a problem as long as you disconnect the battery for at least two minutes before you disconnect the airbags.  But to fix the blend door you must remove the dash and the evap. case.  Before you do that remove the actuator motor and check the door operation manually.  It may just the actuator.