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Hello, I am in the process of pulling the manual on that system. I will return in a few minutes.
Meantime, if its not any trouble, can you tell me how many wires are attached to the blower motor (that will define its type, some are variable speed and prone to electronics problems).
The variable speed blower motors are also missing a run capacitor... So far I am not able to find the manual for that unit in my files or on line, can you tell me about how old the unit is and if you want to do the repairs yourself or not.
For that I will need a close up, exceedingly well focused photo of the wiring diagram glued to the inside of the blower access door.... photo needs to be taken straight on and very well lit as well.
To attach photo, use the 'attach files' link to the left of your send button.
We can go from there.