Blower on furnace hums and doesn't start

Too many variables to diagnose by remote control like does the blower (fan) motor have a start cap , run cap , both or neither (blower motors can be any of these). Could be a cap problem , relay problem , open start winding or none of these -again depending on your equipment. The best bet is call in an HVAC tech to take a look and I hope your not hitting the fan limit switch with that hammer as it is also a safety device :-( .

Henry

I'd replace the capacitor and see if that fixes it. They are cheap enough to take the gamble. If that dont fix it, the fan motor is probably shot. Take out the whole blower and take it to a motor repair shop and have the motor tested and repaired or replaced. Blower removal should not be that difficult. Probably 4 bolts, and the wires. Of course shut off the power @ the breaker when you remove the wires.

Beat it bozo, so skulk back to your regular NG bonehead

If you live in or near a decent size town, and really know how to work electricity safely....

Lock it out, mark both ends of all connections, pull the fan motor ( take fan off) and the capacitor and take them to your local electric motor rewinding shop. Look for sign that says "counter" in some form. Wait in line patiently, be nice and offer the guy a soda or coffee.They will be able to quickly test both (because they have to disprove 'returns') and sell you the right one wholesale.

The small motors are not rebuilt, but replaced, should be $35 (often) to $75.

It's not rocket science, don't get killed.

Tim S.

this is Turtle.

Mark you need to oil the motor before it eats the bearing up in it and you have to change it. If you have been oiling it, Change the motor out and the capasitor. Don't mess with repairing a motor for all your asking for is trouble.

TURTLE

Tony, You aren't too bright......telling somebody to stick their fingers into a blower wheel with the motor energized???? I hope you got real good liability insurance when "Lefty" comes knocking on your door.

This is Turtle.

Would you leave out bad bearing for some reason?

TURTLE

it hums......................because it doesn't know the words

Mark, Maybe yeah. Maybe no. I don't know. I forget. But slip me a $50 bill and my memory might get better.

Jabs

volts500 Spilled my beer when they jumped on the table and proclaimed in :

Psst. Every furnace I have seen for the last 15 years had a direct drive fan, meaning no belt...

NOI

Wrong thread man..:)

This is Turtle

He had me for a minute here and was gazzing at the screen. I can remember changing a bunch of belts on hvac system [ new stuff ] but he said they don't have them. i had to stop and try to remember where I've been to check on this statement. Awwwwwwwwwwwwww Some of them there new hvac system do have belts. Hey thank you for reminding me I'm suppost to change the belts on the First Baptist church in Pitken , Louisiana for I was suppose to change them last Friday.

TURTLE

CBHvac Spilled my beer when they jumped on the table and proclaimed in :

Again? Gawd dammit! I'm going back to aacf.

NOI

replying to Henry77, Zeke57 wrote: I have a 1993 model cmf power gas furnace, it can work fine flow days then the blower motor just hums, and doesnt start when I spit the fan, can anyone help me, please

If it has a start /run cap, it could be bad.