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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22421
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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I have a T775A//M 2000 Electronic stand alone controller.

Customer Question

I have a T775A/B/M 2000 Electronic stand alone controller. The controller screen is back lit indicating power is still going to the unit but the screen is blank and the controller is not engaging the heat panels. I have turned the power off to the controller in an attempt to reset it but to no avail. Any ideas?
Submitted: 1 year ago.
Category: HVAC
Expert:  BillyHvac replied 1 year ago.

there are no diagnostics or ---- on the screen?

Customer: replied 1 year ago.
No nothing at all. Screen completely blank although it remain back lit.
Expert:  BillyHvac replied 1 year ago.

Thank you.

If there are not even "--------" on the screen much less diagnostics, then there has been a catastrophic failure with the control. That is just a way of saying there has been a short, defect, logic fail or or other component breakdown in the unit.

The controller is not field repairable and must be replaced.