York Furnace making wierd noise.

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Old 01-05-16, 08:46 PM
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York Furnace making wierd noise.

Furnace: P3URC14N09501 (Propane)

Ok.. This is like the 1st week my gas furnace has kicked on since I went to a dual fuel setup and it sounds terrible. When the furnace is running, it's making this vibrating wobbling noise like a motor is running. I thought it was the blower fan, so I ran the fan by itself and it's quiet. The only thing I can think of now is that it might be the draft inducer motor.

A few months back, before I went to dual fuel, when I started my furnace it wouldn't start because there was a dead bird caught up in the fan of the motor. I removed the bird and it ran fine. Now that the furnace is being used because outside temps are just to cold for my heat pump, the furnace is making this wobbly motor vibrating noise.

It's weird because when I stand next to the furnace, it seems a bit louder than what I remember, but it's not this crazy noise I'm hearing upstairs. I only hear it upstairs (1st and 2nd floor .. Furnace is in basement) on the opposite side of the house from the furnace.

Could that dead bird have somehow jacked up my draft inducer and now the problem has started with this noise, or could it be something else?
 
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Old 01-05-16, 09:14 PM
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It can be something else but if the vent pipe isn't glued at the furnace I would turn it off and have a look.
 
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Old 01-05-16, 09:26 PM
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I just went down to look at it again and when I get real close to the inducer motor, I can hear what almost sounds the same, but more of a bearing noise. I'll go check the vent pipe to see if that might be it, but it seems strange to me for it to be it because the noise is on the opposite side of the house, not where the vent pipe is. I'll try and check it now.
 
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Old 01-05-16, 09:37 PM
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Everything looked good. I can say when I put my hand on the vent pipe, I could definitely feel the vibration. It wasn't a strong vibration, but it was there. And the way it oscillates, make me think it's the inducer motor. Is there anything else that might cause an oscillating vibration other than a blower fan or inducer motor?
 
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Old 01-05-16, 10:03 PM
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It just hit me... Since my heat pump was installed, I haven't needed the furnace till now. But when I installed the HP, I had to remove a canvas collar because the new cased coil was taller than the old. Could this vibration have always been there, but it never resonated through because of that canvas vibration collar? BTW the bird find happen just before the heat pump went it.
 
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Old 01-05-16, 10:05 PM
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The purpose of a canvas connection is to reduce noise.

Is it possible to work one in again somewhere?
 
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Old 01-06-16, 06:22 AM
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It's possible, but it's going to take more duct work. The reason I took it out was because right about the canvas was where my bypass humidifier duct was connected to. I'd have to move that up a couple inches to put one back in.

I think I need to get my buddy over to listen to it. He's been a HVAC tech for decades, but he's not a duct guy but I would hope he can tell me what might be causing the noise.

By any chance, could it be the gas burning be causing such a noise? I just have a really hard time believing that an inducer motor could make such a noise that it almost sounds like there's a low rpm motor running just outside the house, when I can barely hear it, when at the furnace itself. The gas burning is louder than the inducer motor, when staring at the inducer motor.
 
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