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heater/ac blower rumbling noise ?

Old 12-04-2018, 11:21 AM
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rayco
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Default heater/ac blower rumbling noise ?

I have a '97' , when I turn on the heater fan, I get a screeching sound that comes and go's... it's fine when the screeching sound go's away...but what's up with that ?
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Old 12-04-2018, 07:34 PM
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Moved to C5 Tech.
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Old 12-05-2018, 01:12 AM
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BigGun
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The bearings in the fan motor are most likely going bad. The motor is easy to replace and not too expensive. Some people have had luck just using some oil on the bearings but eventually it will need to be replaced.
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Old 12-05-2018, 12:11 PM
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Originally Posted by BigGun View Post
The bearings in the fan motor are most likely going bad. The motor is easy to replace and not too expensive. Some people have had luck just using some oil on the bearings but eventually it will need to be replaced.
Agree with BigGun. Had the same noise issue. I was able to save myself some on the motor by oiling and packing the bearing with synthetic bearing grease through the small top hole on the motor bearing casing. I did the repair about 2-3 months ago and it's been quiet since.
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Old 12-05-2018, 03:29 PM
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thanks,... I guess a new blower motor is in order given the age and history...
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Old 12-05-2018, 05:07 PM
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Regardless, the job is pretty easy but beware, it's back-breaking
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Old 12-07-2018, 11:21 PM
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Originally Posted by turabo87 View Post
Regardless, the job is pretty easy but beware, it's back-breaking
Consider removing the seat to improve access. It is only 4 nuts and an electrical connection (if powered). Well worth the time and effort to avoid frustration due to access.
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Old 12-07-2018, 11:59 PM
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Blower motor is only 3 bolts and a connector. If you're not a really big person it is not that bad.
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