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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22678
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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There I have a cuh5075bfa2 heil furnace and the fan motor

Customer Question

Hi, there
I have a cuh5075bfa2 heil furnace and the fan motor keep running, and I checked the control board and there is no connection on Y terminal....
I had to power off the furnace, what can I do next?
Submitted: 1 year ago.
Category: HVAC
Expert:  BillyHvac replied 1 year ago.


The Y terminal is just a place to put a wire nut..Likely your Y wire connects directly to a wire that goes to the outdoor unit.

Locate the G wire...remove that wire and tell me if the blower remains on


Customer: replied 1 year ago.
sorry, my mistake
it is G wire, no connection on that terminal at all
Customer: replied 1 year ago.
There are only 2 wires on the board, W and R
Expert:  BillyHvac replied 1 year ago.

so this is heat only with NO ac?

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


above the burners on the front you have a box with numbers on it with a round dial or a horizontal switch at the numbers?

Or a circuit board in the blower section?

Customer: replied 1 year ago.
I am on working site now, may talk after back home, around 8:30 pm my local time. thanks
Expert:  BillyHvac replied 1 year ago.

no problem.

Just post info when you can or post a pic...this unit could have several types of blower control.

Customer: replied 1 year ago.
Here is the fan control
Customer: replied 1 year ago.
Hi, Billy if you need more pic just let me know, I am working on site, can not answer right way, but I will reply asap when I can.thanks
Expert:  BillyHvac replied 1 year ago.

That is a famous camstat type unit. You will need to replace the control.

Those were high fail rate....