Question about Carrier XHB123D X/Y Series Heat/Cool Air Conditioner
My heater started making very loud whirring noises tonight. I quickly shut it off, and once the burners went out, the noise stopped (blower was still going). I waited a few minutes and turned it back on. Once the burners started going, the noise was back but was intermittent. Dad thought it was a belt slipping? Any ideas? I can't run it due to the noise, and it's cold tonight, so any help would be appreciated!!
Check the draft inducer motor for any partial blockages or dibri.
I've seen sticks, birds nest particles and pieces of deteriorating fan blades (squirrel cage type fans) cause this.
You might also find that the inducer motors bearing are going.
If its a loud vibrating grinding type noise, I'd suspect bearings or missing pieces of the blades. (unbalanced)
If it's a clanking type noise I'd suspect loose items hitting the fan.
The inducer motor will only operate right before and during burner operation, while the blower motor can operate at any time depending on your setting.
Posted on Dec 06, 2008
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