Intermitant heater blower

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Jan 8, 2009 | 06:07 PM

VRC9170

Thread Starter

Mountain Pass

Joined: Apr 2008

Posts: 246

Likes: 9

From: Surrey

Intermitant heater blower

Sometimes in cold weather the blower does not come on for a while, It seems not until the engine warms up. Other times it is on as soon as I turn the key on.Is this a common problem? My truck a 99 F350 PSD. We have been getting as low a -45 here this winter.

Brrrrrr!
Thanks, Bob Bates

Jan 8, 2009 | 11:31 PM

jdecker88

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Joined: Apr 2007

Posts: 7,241

Likes: 1

From: Powder Springs, East TN

Not sure but I will give you a bump.

Jan 8, 2009 | 11:34 PM

megawatt00

Hotshot

Joined: Jan 2008

Posts: 13,144

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From: Rochdale MA

The shaftof the blower may have grime and stuff built up on it stuck to the grease. As the truck warms up hot air flows into the chamber and "softens" the grease allowing it to spin. I had the same problem on a walk in van that I used to own. Cleaned it up with PB Blaster and then a few drops of 3 in 1 oil and she was good to go.

Jan 9, 2009 | 12:47 PM

VRC9170

Thread Starter

Mountain Pass

Joined: Apr 2008

Posts: 246

Likes: 9

From: Surrey

Thanks Jim,
I'll have a look at that. I suspected something like that or a loose wire. Works good today though.
Bob

Jan 9, 2009 | 01:07 PM

Sparky83

FTE Legend

Joined: Jan 2009

Posts: 80,542

Likes: 97

From: Norlina NC

i know its not a ford.. but my s10 had a bad switch for the fan motor.. if it got bumped just the right way it wouldnt work.. even when switching between the other speeds... but sometimes itd work just like its suppose to... so i wouldnt totally count out a bad blower motor switch.. but jims answer there seems more plausable since he had similar problems to what your experiencing..

Jan 9, 2009 | 05:37 PM

tinker934

Senior User

Joined: Jun 2008

Posts: 158

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From: pismo beach

heater

dose it just work on the high setting (fan speed) it could be the resister that is in the engine bay. its got two screws and a power plug pull it and see if the resister is burned up

Jan 10, 2009 | 05:02 PM

MONTANA350

Junior User

Joined: Mar 2007

Posts: 58

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From: Kalispell, MT

Had the same problem this past spring in my '01. The blower motor was going bad. I replaced the motor and squirrel cage (they get brittle) and no more problems. The cost was not as bad as I thought. Dealer price was within $2.00 of Napa.

Bumping the motor worked a few times, but it just had a mind of it own and worked when it wanted to.