Question about 1997 Ford Explorer AWD
1997 ford explorer with automatic temp control, I've replaced the blend door actuator but a few minutes after turning the a/c or heat on air will stop coming out the vents. The blower can still be heard working. The automatic control module under the radio was also replaced.
You may have a vacuum leak in the engine compartment. There is a vacuum hose going from the engine intake manifold though the firewall to the a/c controls. Also in the engine compartment, is a vacuum storage reservoir, a plastic ball, that stores vacuum for the a/c system. Check them first.
here's a test procedure too.
NOTE: To prevent a situation where defrost cannot be obtained, the air handling system is designed to provide defrost when no vacuum is applied to any of the three vacuum control motors. Instead, a leak in the vacuum control circuit will send all air flow to the defroster outlets. This condition may occur during acceleration (slow leak), may exist at all times (large leak), or may exist only when specific functions are selected, indicating a leak in that portion of the circuit.
The vacuum hoses used in the passenger compartment control circuit are constructed from PVC plastic material. The vacuum hoses used in the engine compartment are constructed of Hytrel. Because of the materials used, the vacuum hoses should never be pinched off during diagnosis to locate a leak. Use a vacuum pump to locate vacuum leaks.
Posted on May 31, 2009
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Posted on Jul 18, 2013
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Posted on Jan 02, 2017
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