Blower Fan Speed Circuit Board

**MerrilGordon** · #1 (**permalink**) 09-29-2009, 11:04 PM

Anyone know what the component is and it’s part number on the circuit board that controls the blower motor speed for the heat and A/C ?
I was expecting a power resistor but it looks like a diode. Reads open with an ohmmeter checking polarity both ways. I can’t make out the p/n printed on the component. Anyone know the information ?

Thanks,
Merril

**Tifosi** · #2 (**permalink**) 09-29-2009, 11:28 PM

Model, year?

**MerrilGordon** · #3 (**permalink**) 09-30-2009, 12:24 AM

Certainly overlooked some important info didn't I there Darren !
1989 Milano Verde.

Merril

**Tifosi** · #4 (**permalink**) 09-30-2009, 05:56 AM

Does that model have an intregal heat and AC setup, or is it like many others where they are seperate systems entirely that can be run together so you end up with AC air out certain ducts and heated (or fresh) air out others?

All that comes to my mind is that which I've a tiny bit of familiarity:
A rocker switch to control heater fan off/low/high and a seperate knob for AC off/coldness level with a ring around that to control AC fan speed.

'Course I don't have any real idea as to whether your setup is arranged that way, so might be best to await the arrival of someone who has a real clue and thus could offer better assistance.

dbgrubbs · #5 (**permalink**) 09-30-2009, 06:47 AM

Just a quick search and here's what you're looking for I think:

http://www.alfabb.com/bb/forums/mila...-resistor.html

**MerrilGordon** · #6 (**permalink**) 10-01-2009, 02:09 PM

Don ! Thanks ! That's exactly my problem and you've worked it out. Appreciate the reply and link. My search skills arn't too great I guess as I figured the problem was somewhat common was wasn't locating it.
Thanks for your effort too Darren.
Radio Shack p/n and everything there Don. Couldn't ask for more !
Till next time . . . ,
Merril