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airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8327
Experience:  Furnace, A/C and heat pump specialist.
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My new motor will only run on auto. has different wires from

Customer Question

My new motor will only run on auto. has different wires from the original but i put the same colors in the original positions
Submitted: 1 year ago.
Category: HVAC
Customer: replied 1 year ago.
white motor and white line are on one side of the capacitor. brown wire is on the other side. black and black are connected for high speed. ( I think it was originally on medium which was blue but the new motor does not have blue. I can hear the relay click when the furnace heats up but the fan will not kick on
Expert:  BillyHvac replied 1 year ago.


what is make/model of furnace?

Customer: replied 1 year ago.
Rheem rgda-12ea-er
Expert:  BillyHvac replied 1 year ago.

thank you,

now previous had a feed from the fan center for cooling (usually black motor wire) and another feed from fan/limit control....this feed is commonly you still have the feed available not attached ?

Customer: replied 1 year ago.
it was originally taped off and not in use
Expert:  BillyHvac replied 1 year ago.

thank you...on old motor you should have had 3 wires hooked up....white, and then 2 colors.

What 2 colors were used..and what fed them

Customer: replied 1 year ago.
Blue was hooked up to black. white was on one side of capacitor, along with the white from the furnace . brown was on the other side of the capacitor
Expert:  BillyHvac replied 1 year ago.

Ok.....I am going to open this up for the others to see. There should have been white from old motor hooked up...and then 2 others like black and blue or black and red etc....

Customer: replied 1 year ago.
if I can show you the plate on the motor and the wiring diagram on the furnace would you be able to tell me which connections to make?
Customer: replied 1 year ago.
did you really just f**king bail out?
Customer: replied 1 year ago.
got good info somewhere else, I do not expect to be charged by you. you have given me nothing in return
Expert:  airheatman replied 1 year ago.

Let me know if you still need help with this. If so can you attach a photo of the wires coming from the junction box down to the motor?