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  1. #1
    Join Date
    Jun 2005
    Posts
    4
    has anyone seen this. after you have set the pins on a VS blower to a certain speed the unit later, (maybe weeks later or the next season) it changes to another speed without having done anything to the pin setting? could anything cause a thing like this to happen?

  2. #2
    Join Date
    Sep 2004
    Posts
    172
    Go back and read the wiring diagram some models use the board to control blower speed it will be different in cooling and heat mode trace the circuits you will see it.

  3. #3
    Join Date
    Jun 2005
    Posts
    4
    this unit has separate pins for continous fan(2 pins), cooling and heating (3 pins each)

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