AC problem
05-05-2013, 12:36 PM
#1
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Location: Jacksonville NC
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Year: 1999
Model: Cherokee
Engine: 4.0
AC problem
AC system unexpectedly switch to the defrost mode when accelerating. im thinking its the check valve, what do yall think.
05-05-2013, 11:01 PM
#3
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Location: Wisconsin
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Model: Cherokee
If it temporarily goes to defrost while accelerating, it's a check valve. When the system loses vacuum it defaults to defrost, when you accelerate you lose vacuum unless there is a check valve to retain it.
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