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My 250 000 km, 2003, Coupe, I4, M5. A Marysville, is an Ohio made car.
Yesterday the HVAC blower just stopped. It was blowing good heat, then the noise of air movement stopped.
I used the car a few times. The blower blows at initial start up and runs for 5 or 10 minutes, then shuts down Then starts up and shuts down again erratically.. And so forth.
I’ve searched the forum, but can’t find symptoms identical to mine.
When the HVAC blows, she blows hard without unusual noises, so I think fuses, relay, and blower motor are OK. But I’m not certain. Cabin filters have been well maintained.
Must get it fixed to keep windows defogged.
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Thanks College Man. I think that the video is right on target.
I have located the HVAC blower transistor unit in my car, and it’s very accessible.
I could put it through the various tests in the video, but I think it would pass since the blower always operates at start up.
Waiting for complete failure might help insure that any part that is bad will actually bench test bad.
It’ll probably go bad quickly.
Sounds to me, from my personal experience, that your motor is starting to go.
The best thing you can do is try to catch it during a fault and verify that you have voltage and ground at the blower motor, at all speeds. If the motor has both, replacing the blower would be the next logical step.
[quote=”DaFirnz” post=182214]Sounds to me, from my personal experience, that your motor is starting to go.
The best thing you can do is try to catch it during a fault and verify that you have voltage and ground at the blower motor, at all speeds. If the motor has both, replacing the blower would be the next logical step.[/quote]
What I was thinking. Sometimes there’s mechanical failures and the resolution is simple. Replace it when it fails or until you can’t stand it anymore.
Thanks guys.
The wiring to the motor looks clean and tight with no signs of electrical heat.
I have noticed that the motor terminals are marked – and +, so I might hook it up to the 12 V battery directly and see if she spools up. This should test the blower motor.
Thanks guys. Eventually intermittent went to “no blow” at all, so I could now test for a failed component.
The blower motor is strong but the ground switched power transistor controller was faulty. For the Coupe, PN 79330 S6M 941, and $75 from Honda locally.
See pic of the unit.
The old Coupe is once again a “blow hard”.
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