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Old 02-24-2003, 10:37 AM
Registered User
Join Date: Mar 2002
Posts: 56
Angry Dysfunctional Heater Blower

My heater blower has been putzing out on me... seems to happen only when I use the auto switch control. If I use only the slow or fast setting buttons, the blower keeps working. After some time operating on the auto setting, however, the blower stops blowing. If I turn off the car and wait for about 10 minutes, the blower starts back up again on ignition.

Any ideas on this? What should I check? My guess is that there's a relay on the fritz. Where's the relay located? What's the part called? How much is to replace?

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Old 02-24-2003, 10:49 AM
Potomac German Auto
Join Date: Mar 2002
Location: Frederick, MD
Posts: 407
What kind of car is it?

Heater / blower reguator?

Push button control unit ?
1997 C230
2002 ML320
2000 BMW 528I (WIFEY'S CAR)

"Excuses are crutches for the unfounded."
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Old 02-24-2003, 11:00 AM
Registered User
Join Date: Mar 2002
Posts: 56
Heater Blower Problem

It's a 92 300E. I don't think the push-buttons are at fault...
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Old 02-25-2003, 10:49 PM
Posts: n/a

I had a problem like that before and I replaced the regulator, it works great now
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Old 02-25-2003, 11:00 PM
Registered User
Join Date: Mar 2002
Posts: 56
Heater Blower Dysfunction

Hey Giorriso,

Thanks for the reply! I think I'm going to replace the blower too, because it's making a lot of squeeking noises lately. Is the regulator located below the blower? How much did you pay for the regulator? Is it something done easily enough, especially if I replace the blower at the same time?
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Old 03-08-2003, 11:30 PM
Bruce B's Avatar
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Join Date: Dec 2002
Location: east of Atlanta, north of Macon Ga
Posts: 185
Hope I'm not too late Todd....

If you haven't's an idea for you. The brushes in the blower moter may be worn down. Mine are/were and temp fixed by shimming behind the brushes. I have to get new ones this next week due to my blower stopped working again but for a while it ran like a new one. Brushes are simple to replace if you have a soldering iron.
1991 300SE (my ride, 279,000 miles, looks almost new
1954 Cadillac (21 yo son's car, he bought when age 15)
1972 SeaBird 19 ft runabout (old but solid, slant six, Volvo sterndrive perfect condition, undergoing complete overhaul and refit)
1998 Toyota Rav4 (my sons daily driver when he is in the Continental US, PROUDLY serving in US Navy)
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Old 03-09-2003, 01:41 PM
Registered User
Join Date: Mar 2002
Posts: 56
Heater Blower Motor Replacement

Thanks, Bruce B.

Just to close this thread... I bit the bullet and had the dealer (Keeler, Albany NY) do the work. They replaced the blower motor (part A 000 830 82 08 $313) and they also replaced the Blower Regulator Switch (part A 124 820 27 10 $288). The labor ($89/hr) came to around $400.

All I can say is OUCH.

Thanks to all who replied. If I had more patience and time, I would have gone at this myself.... or at least bought the parts online and brought them to the dealer.

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