Question about Heating & Cooling

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My compressor unit outside runs and cools Freon but the inside blower has a problem running. the model # is 2TEE3F31A1000AA. The fan control, in fan run control mode, shows a bright green for the fan LED and the CFM selection LED varies with the rotational speed of the fan. The motor tries to start showing , initially, a jerky back & forth movement. It squeaks some and may, or may not, start rotating. If it starts the CFM LED goes bright/on no flicker and the motor runs briefly (5 seconds) then stops.With the fan LED on the motor has resistance to turning (rotate from stopped state) and does not free-wheel. It has some rubbing sounds as you force it around. Last year we had a problem with water condensing in the AC-only unit in the attic during cold winter periods. The installer did not insulate the coil/filter box and water had condensed inside the unit. The iron core on the transformer, on the control panel, is rusty.

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  • ietbj Aug 30, 2010

    correction on the handler - it is a variable speed unit TWE031E13FB.

  • ietbj Aug 30, 2010

    Did you get my add-on that blower motor is a var speed, # TWE031E13FB?

  • ietbj Aug 30, 2010

    Did you get my add-on that blower motor is a var speed, # TWE031E13FB?

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Hi, from what you have told me, you are loosing the bearings in this blower motor along with windings. This motor is rubbing the blower housing, tight when you turn it, and when it jerks when it tries to start tells me that you have burned or very weak windings. The run capacitor may also have failed causing this motor to try and start, but will not if this run cap has leaked oil, or has shorted and open internally. It will be a 5 to maybe a 7.5 uf microfared x370 volt run capacitor that should be mounted to the side of the blower housing. It will have terminals on top that the brown capacitor wires connect to. Look it over to see if the top or any where on it is swollen, cracked leaking out oil, or burned. This capacitor starts this motor and keeps it running up to speed. When a capacitor fails, it is usually caused by the blower motor over amping due to over heating because of the windings and worn bearings. You will need to replace both the motor and the run capacitor. By what you have told me the motor is doing, changing out the run capacitor alone will not solve your problem, as it also has bearing problems as it is rubbing. Also, you can get a roll of rubber back a/c tape with a aluminum backing to try and insulate the evaporator box better to prevent this condensation from ruining the controls and shorting more out. This tape is at Home Depot.Yes this motor has a lot of resistance and will not spin freely, due to worn and tight bearings that has caused this motor to over heat at some point doing damage before it could trip on its internal over load. When installing a new motor, depending on this furnace, the motor, blower housing and all with a couple of screws removed will slide right out so it can be taken out doors to remove the faulty motor and clean up the blower wheel as dirt collects on the wheel vanes causing drag and wear on a new motor as well as reduced cfm. If you are planning to take this on your self, mark all wires from the motor and run capacitor, and you may be able to find this motor at a retail appliance parts only house. If you know any contractors you can get one through a wholesale a/c parts house. Also, Granger's is a excellent place to get a motor open to the public and contractors. I wish you the best on this and I know for a fact that this motor is your problem, so replace it and the run capacitor and you will be up and running. Please don't forget to rate me and I know you will be kind to me. I will be checking in to see how it is going for you, so you can also keep me posted.
Sincerely,
Shastalaker7
A/C, Heating, & Refrigeration Contractor

Posted on Aug 30, 2010

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  • Robert Horton
    Robert Horton Aug 30, 2010

    Hi, just to add something, this is a variable speed blower motor. When the unit in attic, the air handler, where this motor is, may have had some moisture get to it to start the process of damage to the windings. The evaporator coil will condensate all summer as long as the system is cooling properly. What will happen if its running and this blower motor stops, the evaporator coil will start to ice up rather fast as there will be know air flow through this coil causing it to freeze solid. Until you decide what you are going to do, the direction you decide, do not continue to run the unit as this will cause damage to other parts of the unit.
    Sincerely,
    Shastalaker7

  • Robert Horton
    Robert Horton Aug 31, 2010

    Hi, and I left you another comment to tell you this, that it was a variable speed motor. Even so, the rubbing, the wheel will not free wheel, spin, is telling me the motor is failing as it has stopped with in 5 seconds after starting, and bearings will cause this resistance. Replace the motor and run capacitor to solve this problem. This will be the solution and I know it can and will cost youu some $$$, but this will have to be done.
    Shastalaker7

  • Robert Horton
    Robert Horton Aug 31, 2010

    Hi, and yes I already knew it was a variable speed blower motor just from what you were telling me from the stat and cfm's on the stat controller. Thank you,
    Shastalaker7

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