me1234

So I just replaced the blower motor on my 1993 Bronco with an Advance Auto motor and squirrel cage. The motor blows fine for the first 3 settings but when you switch it to high it makes a very loud humming/vibration sound and you can feel the vibration through the foot pedals. Anyone know a fix to this? I used RTV to replicate the original gasket and the bolts are down pretty snug.

Here's a pic of the new motor incase anyone wants to see it lol.

Chris_1

iTrader: (1)

Sounds like a faulty motor. Take it back.

wde3477

Sounds like the fan impeller isn't balanced - not seeing any balancing clips on the squirrel-cage. If this was a complete assembly - yep, agree with Chris_1 - take it back. To prove your point, they ought to be able to hook it up to 12V to replicate the issue.