Anonymous Posted on May 07, 2016

Weak blower motor

Fan barely blows. Heat still works okay. A friend told me usually blower motors quit working on one or more speeds. Mine still works - barely on all settings, although "high" is pretty noisy. So, is replacing the blower motor the answer, or is there more to it? Is it accessible from inside - on the passenger side?

jack layton May 08, 2016

My info says to remove blower motor from under the dash.

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Randy Ohler

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Posted on May 08, 2016

Randy Ohler

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Since it blows slow on the first 3 or 4 speeds, it is the blower resistor. And when you set it to high at it gets faster, but make noise, it is the blower also. Just a note. Blower noise can be from the blower bearings are worn out. Or that something has made it's way into the blower fan. You won't really know until the blower is pulled out. I have seen the fan filled with leaves and twigs before.

jack layton

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Posted on May 07, 2016

jack layton

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Check good voltage and ground for blower motor. Actuators under the dash may be restricting air flow? High speed doesn't usually use a resister.
Check for hvac trouble codes, in my part of the country, some of the national brand autostores will check codes for free, if there are any.
If you think problem with blower motor, itself, replace it. Sometimes, you can remove blower motor, use jumper wires for voltage and ground, using inline fuse, come off the battery, see if it blows like you think it should?

Anonymous May 07, 2016

Thanks Jack. I was thinking I'd for sure be swapping out a bad motor. Now I don't know.

I don't know how to check for ground or voltage. Also, what do you mean by "actuators"?

About trouble codes: Would the "service engine" light be on for that? (It's not).

Finally, the fan does blow (barely)on all speeds. It's just that it's noticeably louder on "high (4)".

Bob
jack layton May 08, 2016

Actuators are directional doors or temp door, under the dash that may restrict air flow? If you have good voltage and ground at the blower motor, either the air-flow is restricted or the blower motor is faulty.
Around here, some of the national brand auto stores will check codes for free, if there are any? Tell them the lamp on the dash has been coming on and off, sometimes they won't check it if the lamp isn't on. In the past, I've had inactive codes point me in the right direction.

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