York attic thru the wall a/c

Discussion in 'HVAC' started by justt, Aug 17, 2009.

  1. Aug 17, 2009 #1

    justt

    justt

    justt

    Member

    Joined:
    Aug 17, 2009
    Messages:
    5
    Likes Received:
    0
    looking for some suggestions. unit has a double shafted motor whitch is going off on internal thermal overload. this is a new manufactures suggested replacement motor. amps,rpm's, and voltage are identical to orginal motor, cleaned both coils using coil cleaner, checed rotation and voltage. have tried all i can think of. help!!
     
  2. Aug 18, 2009 #2

    kok328

    kok328

    kok328

    Well-Known Member

    Joined:
    Nov 20, 2007
    Messages:
    2,755
    Likes Received:
    249
    Motor for the condensor or evaporator?
     
  3. Aug 19, 2009 #3

    justt

    justt

    justt

    Member

    Joined:
    Aug 17, 2009
    Messages:
    5
    Likes Received:
    0
    double shaft motor-old unit
     
  4. Aug 19, 2009 #4

    kok328

    kok328

    kok328

    Well-Known Member

    Joined:
    Nov 20, 2007
    Messages:
    2,755
    Likes Received:
    249
    Motor for the condensor or evaporator?
    Did you change the fan blade too?
    The new motor might be bad.
     
  5. Aug 20, 2009 #5

    justt

    justt

    justt

    Member

    Joined:
    Aug 17, 2009
    Messages:
    5
    Likes Received:
    0
    did not change blade for condensor-evaporator is a sqiurrel cage. this is the 2nd motor-(after thinking i had elimated all other possibllities i came to the same conclusion). i am working behind a another mechanic-motor was replaced previously. i am attempting to acquire schematics and specs for this unit.
     
  6. Aug 20, 2009 #6

    kok328

    kok328

    kok328

    Well-Known Member

    Joined:
    Nov 20, 2007
    Messages:
    2,755
    Likes Received:
    249
    For clarification, the condensor motor is a separate motor from the evaporator coil motor.
    The motor you have now described is in the air handler section of your system.
    Even if the motor has been replaced once already, the specs on the second motor seemed to work for awhile but, as you indicated, if you can get the specs for the OEM motor, you may find the cause for repeated replacements. The motor itself may not be bad but, the thermal overload switch might be bad/weak. Your other option is to up the HP on your next motor, probably by a 1/8hp or so. Any larger and you'll be looking at increased amperage.
     
  7. Aug 20, 2009 #7

    glennjanie

    glennjanie

    glennjanie

    Well-Known Member

    Joined:
    Mar 1, 2006
    Messages:
    2,990
    Likes Received:
    4
    He said it was a double shaft motor in a through the wall unit. You know, one shaft has the evaporator fan on it and the shaft on the other end has the condenser fan on it.
    Glenn
     
  8. Aug 20, 2009 #8

    kok328

    kok328

    kok328

    Well-Known Member

    Joined:
    Nov 20, 2007
    Messages:
    2,755
    Likes Received:
    249
    Oh, now I know what he's talking about, sometimes you have to drop a ton of bricks on me before I get it. I've actually installed a couple of these in my time and don't know why it didn't occur to me. However, these are what I call packaged units and never really opened one up or paid much attention to the internals. Typically when these go bad, there at the point where it's just a total replacement. Thanks for the wake up call.
     

Share This Page