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Blower motor stops

masterfabr

By masterfabr
in Ask A GM Technician

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masterfabr New Member

masterfabr

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1994 Kodiak. Heater/AC blower operates normally on low and medium. Blower runs on high for approximately 10 minutes and shuts down. Turn off and approximately 90 seconds later will run normally when turned on for another 10 minutes. Repeat,repeat.

Blower,speed resistor,and control head replaced at this point. Resistor harness is good and measures no resistance in connector. All connectors test good. Relays have been swapped out with known good ones. Symptoms remain.

Amps on low ,med and high are 4, 9 and 20. Blower will run long term on low and medium with no issues. This problem occurs in heat and AC mode identically the same.

PLEASE Help. Thanks!

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