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Front a/c good, rear not working


arcturusmine
08-19-2013, 11:04 PM
I have a 2002 Montana with rear air. It blows cold in front, but warm to hot in back. Any thoughts as to what might be causing this?

Thanks,
Todd
gmtech1
08-20-2013, 01:19 PM
I have a 2002 Montana with rear air. It blows cold in front, but warm to hot in back. Any thoughts as to what might be causing this?

Thanks,
Todd


Low charge will cause this condition. Should have the system verified for proper charge. With rear a/c a full charge is 2.20lbs.
Tech II
08-20-2013, 10:14 PM
Like GMTech1 said could be a low charge.......with A/C running, feel the low side pipe to the front evaporator, should be cold since the A/C is working in front.....now get under the vehicle and feel the low side pipe to the rear evaporator......should be cold like the front......if it isn't, low charge....if it is, then check temp door operation.....
arcturusmine
08-21-2013, 04:57 PM
Thanks for the info. I played around with the blender motor harness and that seemed to work. The blender door was open to the heater core. Once I played with the connector, it closed and is working fine.

Thanks!

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