Honda Car Forum

I have a 1992 Acura Vigor heater/AC fan problem. I don't think it is the
fan motor itself. Everyday it will work on the first starting of the car
(most of the time). It will start blowing air in the car sometimes when
I'm driving on the freeway (the fan comes on). Once the fan is on it stays
on until I turn it off, then nothing on the next attempt. Once it came on
when I hit a bump, thus I think it is in the switch or electrical
connection. Any advise?

"Farny" <richfarnsworth@nospam.gmail.com> wrote in message
news:d8175887ae476725e53f7d6b14ac6781@localhost.ta lkaboutautos.com...
>I have a 1992 Acura Vigor heater/AC fan problem. I don't think it is the
> fan motor itself. Everyday it will work on the first starting of the car
> (most of the time). It will start blowing air in the car sometimes when
> I'm driving on the freeway (the fan comes on). Once the fan is on it stays
> on until I turn it off, then nothing on the next attempt. Once it came on
> when I hit a bump, thus I think it is in the switch or electrical
> connection. Any advise?
>
We had a similar situation on the alt.autos.volvo group this past month. The
symptoms pointed to the control circuit and led us a merry chase, but it was
really dead spots in the commutator of the blower motor. If you can get your
finger or even a popsicle stick on the fan squirrel cage when it isn't
working, giving it a little nudge will tell the story. If the motor has dead
spots it will start and run until you turn it off. Then it might or might
not restart, depending on where it lands. If you can turn the fan motor an
"o'clock" or so without it taking off, you can pretty much rule out the
motor. Alternatively, if you can measure the voltage to the motor when it
isn't working that will tell the story.

Mike