# Fan blower

**URL:** <https://community.cartalk.com/t/fan-blower/47602>\
**Category:** Maintenance/Repairs\
**Tags:** blower-motors, gmc, 1500\
**Created:** [April 18, 2010, 12:57am UTC](https://community.cartalk.com/t/fan-blower/47602 "2010-04-18T00:57:24Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![texascountryland](https://avatars.discourse-cdn.com/v4/letter/t/48db29/32.png) [@texascountryland](https://community.cartalk.com/u/texascountryland)\
**Post date:** [April 18, 2010, 12:57am UTC](https://community.cartalk.com/t/fan-blower/47602/1 "2010-04-18T00:57:24Z")

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I replace the air/heater fan motor today. The old one was blowing on all 3 speeds but making a nosie. The new one runs but will not blow well at all.

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**Author:** ![Triedaq](https://avatars.discourse-cdn.com/v4/letter/t/65b543/32.png) [@Triedaq](https://community.cartalk.com/u/Triedaq)\
**Post date:** [April 18, 2010, 1:01am UTC](https://community.cartalk.com/t/fan-blower/47602/2 "2010-04-18T01:01:20Z")

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I thought I had a blower problem on my 1978 Oldsmobile as the blower was running, but not moving much air. I found that I had knocked a vacuum hose loose that controlled the blend doors while working on the engine. Is it possible that you might have done the same thing?

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**Author:** ![Harvey\_M](https://avatars.discourse-cdn.com/v4/letter/h/57b2e6/32.png) [@Harvey\_M](https://community.cartalk.com/u/Harvey_M)\
**Post date:** [April 18, 2010, 1:01am UTC](https://community.cartalk.com/t/fan-blower/47602/3 "2010-04-18T01:01:29Z")

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if you mix up the wires it will turn in reverse and not blow , also have seen them wirred wrong from the factory

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**Author:** ![Triedaq](https://avatars.discourse-cdn.com/v4/letter/t/65b543/32.png) [@Triedaq](https://community.cartalk.com/u/Triedaq)\
**Post date:** [April 18, 2010, 1:02am UTC](https://community.cartalk.com/t/fan-blower/47602/4 "2010-04-18T01:02:57Z")

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Also check to see if the ground of the motor is clean and tight and doesn’t have any electrical resistance.

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**Author:** ![tardis](https://avatars.discourse-cdn.com/v4/letter/t/f0a364/32.png) [@tardis](https://community.cartalk.com/u/tardis)\
**Post date:** [April 18, 2010, 1:47am UTC](https://community.cartalk.com/t/fan-blower/47602/5 "2010-04-18T01:47:25Z")

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I think that’s the best bet. Turning backwards, it will blow some, but not nearly as much as it would turning the correct direction.