Blower problems-humms and wont come on. - http://www.hvacmechanic.com/ Forums
Original message
| tcoffey1
 |  "Blower problems-humms and wont come on."
, posted Tue 2 Sep 19:53:  
I have a Lennox Merit series furnace. My blower will not come on in auto or on. When I do switch the blower to the on postition, I can hear a humming noise from within the furnace. Its like its trying to run but cant. I have been told it could be the capacitor? Reading others here, my unique twist is the humming of the motor... I will also try to clean out the area of dust and see if the fan is stuck on anything... Any other ideas would be greatly appreciated. Thanks.
[this message was edited by tcoffey1 on Tue 2 Sep 19:54] |
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| oldmangobles
| "Re(1):Blower problems-humms and wont come on." , posted Thu 4 Sep 16:24
if the motor spins freely with no power,put in a new capacitor.$20.00 is a cheap test.the capacitor is usually attached to the blower housing,two wires going to ir,about the size of a can of tomato paste.turn off the power and short out the two posts in case of static charge.
old man mike
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| | tcoffey1
| "Re(2):Blower problems-humms and wont come on." , posted Fri 5 Sep 09:00
Thanks for the help, I did that and same problem. I spun the fan and it spun freely. After hooking up with a motor guy we found the bearings were worn to the point that it would not allow the motor to run from the low speed. I could spin the fan with my hand and then hold the door switch and it would get up to speed. Fix is a new motor, cant fix these bearings I guess... Installed new motor and everythings "cool" again.
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