1075rpm 1/2hp condenser fan motor bad
On a recent call, i found the condenser fan motor bad. I have seen motors do this before but not known why. When off, the motor spins freely. When power is applied the motor locks tight and does not spin. The motor is not too expensive and has been replaced. I would like to know how and why this happens...
Who's the manufacture of the motor?
this one was by 1 Source
but as i say i have seen it before and i believe it was OE
Bad bearings, magnetic field locks it up when power is applied by pulling it into the windings.
Did you ohm out the windings by chance?
the real question might be what made it fail. was it over charged too much heat was the wrong capacitor used. was it the right Hp rating. voltage drop?
What is the cause of bad bearings? Purely mechanical failure, maybe the fan was not balanced? Or maybe the OP just had a bad capacitor?
My Blower motor Hums, Spins free but won't run?
One of the most common problems in furnace blowers and light duty motors that use an all angle sleeve bearing is that as that bearing wears and becomes looser the magnetic field that makes the rotor assembly go around is able more easily to pull that rotor assembly against the stationary iron preventing it from rotating while power is applied. The easiest way to determine if this is the issue is to firmly grab the motor shaft while holding the motor against a bench or allowing the mounting to hold it, and see if there is movement side to side or up and down against the side of the bearings. NOTE: it is normal for the shaft of these motors to have end play- that is to be able to push the shaft in toward the motor or pull it out slightly, however there should be no play side to side. One other possibility for the failure of these motors to run, while humming, is a bad motor run capacitor. If there is an externally mounted capacitor on this motor, you can easily remmove it & bring it in we will be glad to test it for you.
The run cap checked good.
The when no power was applied the blade spun smooth as butter on a hot skillet
could be a imbalance issue but the fan appears to be undamaged, i know this does not mean one of the weights are all present but it sounds well while running.
as far as ohm windings, i had no reason to, because i knew it was bad anyhow.
ill check it later when i get off. its in the back of the truck still. Let ya know.
Voltage was not out of balance
No big deal, motors will fail, maybe the OE was made in China or just old? It is nothing to over analyze, I just put some anti seize on the shaft for next time so the blade comes off easy.
changing the same part repeatdly on the same equipment is a great way to keep the pocket fat but does not keep the business name shiny.
matter of fact this motor came with a one year warranty and we changed it 14 months ago.
personally i am somewhat embarassed.
I pride myself in what i do and if my repairs dont last i feel it has something to do with install error.
Not necessarily, i kno, but i still would like to learn from my mistakes and not make money off them.
Thank you for your opnion Mr. Eugene.
14 months ago, was it made it China? If so it tell your customer, hopefully they understand?
I got over the fact that parts being supplied went to crap about 10 years ago, and the trend is getting worse on bigger items, it is not your fault or mine. Blame the corporations with the politicians in their pockets. Hopefully the politicians and CEOs have multiple failures on their durable goods, and I hope they get uncomfortable while waiting for the repeat failures due to crappy imported parts.
ill keep that in mind next time im on a call 7:30 on a friday!!!!
One's pocket will not stay fat long if the business name becomes tarnished...
Originally Posted by 02JeepKing
Probably a different wording of a Proverb or Chinese saying.
Quality work at a fair price with excellent customer service!
Romans Ch's 5-6-7-8
2 Chronicles 7:14