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  1. #1
    Machine Gunner muddywings's Avatar
    Join Date
    Aug 2012
    Location
    CO Springs
    Posts
    1,547

    Default Furnace question

    Tried for some heat today and no luck. Im 75% sure it could be a blower but don’t want to drop $100 if im wrong.
    Lennox G40uh furnace
    Two slow flashing lights
    A/C works and i feel air in the vents (part of my confusion)
    When i have ac on the blower fan (im pretty sure its the fan im looking at) doesnt run but as i said i feel air in the vents. See pic

    Ask for heat and i get nothing
    In heat mode i try the fan in on, automatic and circulate- no noise or movement.

    Codes:


    Confirm this is the blower in question and i aint smoking crack:




    Best way to see if the blower is getting power?



    Does the furnace blower operate in A/C mode? Or is that part of the A/C system that circulates that air?

    Thanks

    ETA: circuit board went bad about three years ago. Cant recall the symptoms but made me call for service vs trying on my own.

    Sent from my iPhone using Tapatalk
    Last edited by muddywings; 09-29-2018 at 10:11.
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