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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22541
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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Replacing Lennox 68j8401 control board with new 100269-05

Customer Question

Replacing Lennox 68j8401 control board with new 100269-05 control board. Have 6 wires that I have no idea where they go
Submitted: 1 year ago.
Category: HVAC
Expert:  Gaztech replied 1 year ago.

Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue.

If my initial response doesn’t answer your question then let me know and we can continue our conversation.

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Are you ready?

Customer: replied 1 year ago.
Customer: replied 1 year ago.
What info do you need
Expert:  Gaztech replied 1 year ago.

Stand by, just studying both boards

Expert:  Gaztech replied 1 year ago.

can you take a clear picture of the 6 wires you need to connect and the board

Customer: replied 1 year ago.
On 68j8401 I have a blue wire that comes from thermostat wire to screw terminal labeled T. There is no T terminal on new board I also have 2 brown wires that connect to spade terminals labeled C & L. The new board has one spade terminal labeled 24v & L
Expert:  BillyHvac replied 1 year ago.


Do you still need help? My name is ***** ***** different tech

T is no longer used. It was a anticipator...L is the was for a light or alarm no longer used.

Are your other wires the C R W O Y?

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

yep, you have a newer board which does not need the thermistor wires (purple T) or the L wire.

See this booklet towards back...the T and L are discussed and the diagrams show changeout....HERE