F150 Air Conditioner
#1
F150 Air Conditioner
A/C works great until going up a hill of anything else that loads the motor. When the motor loads the air flow switches from the dash to defrost (windshield). When the load goes away, it switches back to the dash. Sounds like some sort of vacuum problem to me. Any ideas?
#3
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Join Date: Oct 2000
Location: Livonia, Michigan
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There is a vacuum check valve plumbed somewhere in your vacuum system that needs to be replaced. When working properly, this check valve will pass air freely in one direction, but only minimally in the reverse direction.
#4
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A/C works great until going up a hill of anything else that loads the motor. When the motor loads the air flow switches from the dash to defrost (windshield). When the load goes away, it switches back to the dash. Sounds like some sort of vacuum problem to me. Any ideas?