# A/C Fan speed works in all positions other than high

**URL:** <https://community.cartalk.com/t/a-c-fan-speed-works-in-all-positions-other-than-high/85176>\
**Category:** Maintenance/Repairs\
**Created:** [May 26, 2014, 7:47am UTC](https://community.cartalk.com/t/a-c-fan-speed-works-in-all-positions-other-than-high/85176 "2014-05-26T07:47:33Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![69CamaroGuy](https://avatars.discourse-cdn.com/v4/letter/6/7c8e57/32.png) [@69CamaroGuy](https://community.cartalk.com/u/69CamaroGuy)\
**Post date:** [May 26, 2014, 7:47am UTC](https://community.cartalk.com/t/a-c-fan-speed-works-in-all-positions-other-than-high/85176/1 "2014-05-26T07:47:33Z")

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I have a 1995 Chevrolet Suburban that the a/c fan speed works on every position except high. I have replaced the resistor and the fan speed switch. Neither of those things fixed the problem. With the connector off the blower motor and a test light attached, power is present in all positions except high. When switched to the high speed position power is not present in the lead. Please advise. Thanks

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**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\
**Post date:** [May 26, 2014, 8:04am UTC](https://community.cartalk.com/t/a-c-fan-speed-works-in-all-positions-other-than-high/85176/2 "2014-05-26T08:04:39Z")

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From a fuzzy memory, I think that the high speed position is powered separately through a high current fuse underneath the hood and then through the blower relay.  
That’s fairly common with GM vehicles.

If the fuse has gone south that could be a sign of a worn, dragging blower motor.

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**Author:** ![missileman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/missileman/32/1366_2.png) [@missileman](https://community.cartalk.com/u/missileman)\
**Post date:** [May 26, 2014, 4:34pm UTC](https://community.cartalk.com/t/a-c-fan-speed-works-in-all-positions-other-than-high/85176/3 "2014-05-26T16:34:56Z")

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Agree with @ok4450 that it’s probably a blown fuse.

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**Author:** ![knfenimore](https://avatars.discourse-cdn.com/v4/letter/k/9fc348/32.png) [@knfenimore](https://community.cartalk.com/u/knfenimore)\
**Post date:** [May 26, 2014, 4:58pm UTC](https://community.cartalk.com/t/a-c-fan-speed-works-in-all-positions-other-than-high/85176/4 "2014-05-26T16:58:55Z")

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There is a Blower motor high relay.