Question about 2004 Buick LeSabre

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How do I repair a noisy heater fan?

Every time I turn on the heater fan, it makes a very loud noise.

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Replace the motor for the noise is fron the internal bearing that is worn

Posted on Feb 06, 2010

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Posted on Jan 02, 2017

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Water pump making noise , could depending how worn it is . Before you have a bunch of parts changed why don't you take it to a reputable repair shop an have checked out .

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Ac fan is making extremely loud noises


Are you referring to the blower motor inside the car? If so, they get leaves in them which puts them out of balance and makes them noisy. Just take out the blower, 3 screws, and clean it. That's the cheap answer. It can be a bad blower motor.

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'00...noise (sounds like it could be a bearing) when the defroster is turned on. Same noise is heard when the A/C is activated. If they are left off, everything is normal. The interior fan functions as...


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It is possible that a stray leaf or piece of debris is stuck in the blower fan blades. This is more likely if the noise began suddenly. You will have to access the blower and remove it to inspect the blades. If their isn't an obvious debris problem, the blower fan bearing may be wearing out and getting noisy; although this noise would slowly get worse and worse every day.

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Is it noisy with only the blower fan on or does the A/C have to be on to get the noise.
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Your heater fan bearing is shot,,time to replace Fan now before you really need it.

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sounds like relay to me but what blew it, most likely dry bearings on blower motor causing your noise clean oil fan motor install relay

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Heater fan motor


The fan motor can be checked by using jumper wires. remove the wiring connector from the fan.Run the positive wire from the battery to the positive on the fan and the ground to ground. It should turn smoothly and at normal speed at 12 volts.If it is slow and noisy, the bearings making the noise. This indicates the motor is bad.

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