front blower motor runs five seconds and shuts off for thirty seconds

2008 FORD EXPEDITION
99,000 MILES • 5.4L • V8 • 2WD • AUTOMATIC
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my front blower motor run for about five seconds then shuts off for forty five to fifty seconds and will do this on auto or manual mode. Heat or A/C, the rear blower works fine. I have replaced the blower motor relay with the correct on and also replaced the wire plug.
Aug 22, 2017 at 8:41 AM
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It sounds like the blower motor is going bad. Here is a guide that will help you confirm the problem by testing for power at the motor while it is not working.

https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only

There is also a blower motor fan controller right at the blower motor I would suspect as well.

Here is a guide and some diagram to help with the testing.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Please run some tests and get back to us so we can keep helping you.

Cheers, Ken
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Aug 23, 2017 at 10:54 AM