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Why is AC blowing warm air through front vents?

(2002 GMC Yukon)
in Glendale, AZ on June 25, 2017
I had a mechanic replaced all new AC parts on my 2002 GMC Yukon. New compressor, condenser, accumulator, orfic tube and expansion valve. It's blowing warm air through the front vents and blowing cold air in the rear. Tech said the actuator and blend door are working properly. Can you please help? Thanks.
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on June 25, 2017
Hello, are the system pressures normal? Everything described sounds like a temperature blend door problem indeed. When you turn the temperature control to total hot, does it get super hot? Or does it stay the same? Does your Yukon have an automatic climate control system or manual?
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of Mike's Garage on June 25, 2017
Sounds like maybe somebody forgot to install the orifice tube, or did not replace it and it is plugged.
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