1995 Jeep Cherokee blower position changing

1995 JEEP CHEROKEE
365,000 MILES • 6 CYL • 4WD • AUTOMATIC
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GMEANS
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can you tell me how to fix a problem with the blower motor changing position when the motor is under load. a/c works fine but jumps back and forth between a/c position and defrost when engine is under load. seems to be a dodge thing. i have two pickups that do the same thing. had vaccum lines checked (cursory) but nothing apparent. thanks
May 17, 2010 at 9:49 PM
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MHPAUTOS
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Hi there,

I would be checking the actuator vacuum system, get the system check with a hand vacuum pump, i feel that you will soon find a leak, also check the vacuum supply is sound.

mark (mhpautos)
May 18, 2010 at 7:10 AM