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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have replaced the control board and the blower motor on my

Customer Question

I have replaced the control board and the blower motor on my trane xe 80 and I still can't get the fan to come on. Need help tracking down what the issue is?
Submitted: 1 year ago.
Category: HVAC
Expert:  BillyHvac replied 1 year ago.

hello,

is it blower for fan on and also heat that do not work?

Customer: replied 1 year ago.
Hi Billy, I talked to you a few days ago and you helped me troubleshoot my fan issue. Heat and AC are both working just no fan.
Expert:  BillyHvac replied 1 year ago.

ok is this the one where the we put L1 to motor and it just hummed?

Customer: replied 1 year ago.
Expert:  BillyHvac replied 1 year ago.

and you replace motor with same wiring/style and the motor still does not work?

Customer: replied 1 year ago.
right
Expert:  BillyHvac replied 1 year ago.

and does the blower have a capacitor separate from motor?

Customer: replied 1 year ago.
it was replaced as well
Expert:  BillyHvac replied 1 year ago.

and what happens with this one if you take the black L1 and hook direct blower motor black?

Customer: replied 1 year ago.
let me try again
Expert:  BillyHvac replied 1 year ago.

ok, black main power wire to black motor wire

Customer: replied 1 year ago.
took black wire off of cool-h and moved black wire from line-h to cool-h, is that correct?
Expert:  BillyHvac replied 1 year ago.

for this one...lets put the 2 wires directly together metal to metal..and put a piiece of tape loosely over exposed metal of any kind..so black direct to black and turn power on

Expert:  BillyHvac replied 1 year ago.

for this one...lets put the 2 wires directly together metal to metal..and put a piiece of tape loosely over exposed metal of any kind..so black direct to black and turn power on

Customer: replied 1 year ago.
they both have plastic covered clamps
Customer: replied 1 year ago.
nvm, I figured it out
Expert:  BillyHvac replied 1 year ago.

yes, but you can use a small nail or wire and insert into each thus joinng them

Customer: replied 1 year ago.
it works
Customer: replied 1 year ago.
you there?
Expert:  BillyHvac replied 1 year ago.

yes...how did test go?

Customer: replied 1 year ago.
worked
Expert:  BillyHvac replied 1 year ago.

ok...now everything works but not together...what color wires from motor are on what terminal on control?

Customer: replied 1 year ago.
white -> cir-n
black -> cool-h
red -> heat-h
blue -> park
purple -> park
brown and brown/white -> capacitor
Expert:  BillyHvac replied 1 year ago.

what motor number did you install? and on any literature with motor did it say what the purple speed was?

Customer: replied 1 year ago.
GemTech GT-E50-MHP2
1/2 - 1/6 HP, 1075 RPM
208-230 VAC, 60 Hz
3.6 Amps, 10uf Cap
Evaporator Motor
Multi-Horsepower
Customer: replied 1 year ago.
Black -> Hi
Blue -> Med-Hi
Purple -> Med-Lo
Red -> Lo
Expert:  BillyHvac replied 1 year ago.

I thought this a 120v furnace ?

Customer: replied 1 year ago.
It is, okay that is the issue. This is the second incorrect motor they have given me.
Expert:  BillyHvac replied 1 year ago.

whew...thought I messed up and you working on a fan coil unit.

Get new motor straightened out and then let me know

Customer: replied 1 year ago.
Hi, I got the new motor (120 volts) and got it installed. It won't run from the control board but will when connected directly to power. I am afraid I fried my control board either when I wired it up wrong initially and it blew a fuse or when I hooked it up and ran that incorrect 220v motor on it. Is there a way to verify that my control board is jacked?
Expert:  BillyHvac replied 1 year ago.

With the wires where you had them...do you have any activity from fan on, heat or cool?

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