loud rattling in Bryant furnace - http://www.hvacmechanic.com/ Forums
Original message
| Canuck2s
 |  "loud rattling in Bryant furnace"
, posted Thu 28 Aug 11:45:  
I have a Bryant Plus 90 350MAV furnace that is about 7-8 years old. Recently it began to make a rattling noise that starts about 3-4 seconds AFTER the motor kicks in, and stops immediately when I turn it off (even though the squirrel cage is still turning / freewheeling). I took out the housing containing the motor and squirrel cage, and it runs quietly by itself outside of the furnace. However, once I put the housing back into the furnace, the rattling starts again. I don't see any obvious problems with the baffles on the heat exchanger. Any ideas?
Thanks.
[this message was edited by Canuck2s on Thu 28 Aug 18:48] |
| Replies:
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| Jojo98
| "Re(1):loud rattling in Bryant furnace" , posted Fri 29 Aug 01:13
Did you check both the induced draft motor and the blower motor?
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| | Canuck2s
| "Re(2):loud rattling in Bryant furnace" , posted Mon 1 Sep 12:43
No. I only checked the blower motor. Where is the induced draft motor? And, may I ask, why would it make noise only when the housing/squirrel cage/blower motor are running inside the furnace but not when the housing is running outside the furnace?
Thanks.
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