A/C Blower Not Working
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A/C Blower Not Working
So I was out of country for a week, and when I got back state side to the blistering cold of the North East, my blower decided to stop working. I'm getting hardly any air flow out of my vents, and it doesn't change at the different speeds. I pulled the blower motor and checked what kind of power it was getting from the pigtail, at all 4 speeds its getting 14.4 volts and 4.6 amps, nothing changes when I change speeds inside the truck. I'm wondering if its the resistor or something else? I've seen when the resistor goes, usually a couple of the fan settings still work, while none of mine are working. Thanks!
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when I pulled the motor, it was spinning, but just barely. Its getting 12v and 4.6amps from the pigtail.
Ill try the bench test, but what else would it be?
Ill try the bench test, but what else would it be?
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Joined: Nov 2017
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From: Bellville TX.
I’m sure it’s the motor......but b4 I would purchase one. I would bench test it......
if if you have a compressor, I would blow it out very well......
ive had them go bad, take them out clean them, then spray wd40 to them and they worked
if if you have a compressor, I would blow it out very well......
ive had them go bad, take them out clean them, then spray wd40 to them and they worked
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If it stays on high, usually the blower motor resistor needs to be replaced.
I've read where the blower motor stays on other speeds, but high is the default when the blower motor resistor goes bad. I see you replaced it.. Hmmm,,,
Does it look like the following pic?
Does sound like it could be the motor since you replaced the resistor.....unless the 2nd resistor pack is bad
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Joined: Jan 2004
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From: St Louis
The component shown in post #10 is not used in your truck, that's for EATC-equipped and EATC wasn't available on the 99 SD.
The resistor is bypassed in the HIGH speed position. It cannot cause your failure if the switch is in the HIGH speed position.
Where and how did you come up with those numbers?
The resistor is bypassed in the HIGH speed position. It cannot cause your failure if the switch is in the HIGH speed position.
Its getting 12v and 4.6amps from the pigtail.