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Old 09-22-2003, 10:25 PM   #1
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**Furnace Noise**

Furnace Noise!

I need to check my furnace. The last time I had it on it started making noise like the bearings went dry. I suspect it may be in the motor or squirrel cage bearings.

Does anyone know if these bearings would be sealed? It would be nice if all I had to do would be to just add a drop of oil or something simple like that.

Itís the Suburban model# NT-30S.

Has anyone had this problem?


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Old 09-22-2003, 11:49 PM   #2
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It ain't easy!

I had the same problem with my NT 22 .I tore the whole thing down and the motor has sealed bearings. I tried to get it rebulit but nobody would touch it. I got a spare from a generous forum member but the noise seemed to deminish enough with light use that I haven't changed it out.
If you can figure out how to get the squirrel cage off you might be able to lube it -but it's not your normal loosen the set screw deal.You can't get the housing apart without removing the s.cage and I never got there!

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Old 09-23-2003, 09:55 PM   #3
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I spent some time checking out the furnace today and after turning the gas on and the temperature up to test it, it seemed to run just fine. I didnít hear the noise I previously heard but I thought I might have heard just a hint there might still be a problem.

At any rate I think Iíll wait until itís broke before I fix it!

It will probably show itself when we go out on some real chilly night, no doubt!
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Old 10-07-2003, 02:36 AM   #4
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I hate bearings.......

Hi Silvertwinky...
Not A/S related, but our washing machine made a hell of a grinding noise, and threw a was an awful noise, sounded like a dry bearing...we call out the fix-it Guy, he starts it up...NOTHING...not a darn peep, did the whole cycle...perfect...he gets out of the door, and it STARTS agn...calls him bk in, and NOTHING...stopped as soon as he puts his foot into the I'm NO expert on washers...but I think this one is taking the cookie...Well he takes things apart, jus 2b on the safe side, checked ballance of the drum, seals, and goodness knows what else...he says it's NOT the bearings, as they would be making a rumbling noise all the time...and as they r sealed, it is quicker 2 throw in a exchange motor, as this one is 5 yrs old, well I managed 2 get a good look at the unit, and if it does pack up, I will do the job myself, after all he did charge me £30.00, for 1/4 of an hour....still not convinced...saying that, he's the EXPERT.
Realy got us in a spin that day...LOL...Chris.....
It's NICE 2B Important...but it's more Important 2B NICE...Chris.....
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Old 10-07-2003, 04:42 AM   #5
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I just discovered last night that I have double furnace problems! I tried to turn the furnace on in the house last night for the first time this season and it didn't work so I decided to sleep in the Airstream instead. The furnace in the Airstream started up but it was making the same "dry bearing" noises Silvertwinkie described. I ignored it and went to sleep. I woke up at 4 this morning to 30 degree temps and no furnace running at all!
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