Fan Speed

Discussion in 'HVAC Heating & Cooling' started by moisheh, Nov 25, 2009.

  1. moisheh

    moisheh Member

    Sep 9, 2006
    Mexico and Canada
    Can someone tell me how to adjust the fan speed on a 10 year old Trane XL80 mid efficiency unit? Is it done with dip switches? or?


  2. jimbo

    jimbo Plumber

    Aug 31, 2004
    San Diego, CA
    Get the install manual for you furnace. I'm not sure that a 10 year old XL80 is a "mid efficiency" unit. I think it is a basic 80% efficient, with a multi-speed motor, not a variable speed motor. A quick look at the motor itself would probably confirm.
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