Question about Heating & Cooling
Lennox 18m8101 furnace system have ecm blower motor just rock back and fouth does,nt spin how to reset let it spin
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: blower motor
Hill, which blower motor? The exhaust inducer or the room air blower? If you are referring to the exhaust blower, check for a restriction in either the fresh air inlet, exhaust pipe or condensate line. If you are referring to the room air blower and you already replaced the motor, it is most likely a relay on the control board. You will need to replace the whole board. More info is always better!
Posted on Jun 13, 2008
ecms are pretty reliable and electronic failure is much more common than bearing or bushing wearout. i suspect the fins on the blower may be coming loose from their pressed on spline and that will start a vibration or shimmy or you could have thrown a weight that balanced the wheel . best to use to warranty to get a new wheel. good luck
Posted on Dec 07, 2008
Check the following link.
My system failed today. I jumped the Thermistor to get me by until the replacement get here.
Total cost plus shipping was under $30.00
Posted on Jun 22, 2009
If the shaft doesn't freely spin then the bearings have seized and quite likely will not free up. Check to see if there are oil ports on the motor. If there are little plugs on the motor, make sure electric is off and then take out plugs and get a zoom spout type container of oil and put a very little bit of oil in them. Plug the ports back up, move the blade around a little. Re-energize unit and see if it starts.
Posted on Jul 10, 2009
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