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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have a Trane furnace, control board is a White Rodgers50A51-405.

Customer Question

I have a Trane furnace, control board is a White Rodgers50A51-405. The red led light is out. I get no fan, no heat , no cool etc. I ordered a new board thinking that wasthe issue same situation. I have 120vac at the board. What might be my issue? Could the replacement be bad? Looking at the error code list no light indicates no power.
Thank you,
Submitted: 2 years ago.
Category: HVAC
Expert:  gotoman for ac replied 2 years ago.
Russ here. Welcome. I am here to help. Please do not rate until you are satisfied with answer. Always available for follow up questions. Need to check to see if you are getting 24 volts to board. Check the low voltage side of transformer to see if 24 volts in showing. Russ

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