[zeeze]

Hi, I have 50A65-120 board that's according to a technician, it's gone bad and need a replacement. Here's the exact board for reference:

50a65-120 / 56L8401 / 12L6901 / 10M9301w | eBay

50a65-120 / 56L8401 / 12L6901 / 10M9301w.

www.ebay.com

My question is can I use 50A66-123 instead? Here's a link for reference. This one is also made by Lennox and has all the same connections but it's more than $100 cheaper.

Emerson 50A66-123-04 Furnace Control Board 150-0993 | eBay

We will work with you on a solution! A USED ITEM IN FUNCTIONAL ORDER. INSTALLATION .

www.ebay.com

My furnace model is 80UHG2-45A-3 and it only has blower fan active. Inducer motor kicks in and stops within a second and obviously no ignition. Tech ran some tests and concluded that board is gone bad.

 

[zeeze]

Thank you Ben!

I did some more research on the cheaper Emmerson board and it is compatible per their spec sheet.

https://climate.emerson.com/documents/21d83m-843-installation-instructions-en-us-1569306.pdf

 

[zeeze]

Wow, that's a lot of service calls! Be safe, I hope you get some time to spend with your family and Happy Holidays!!

 

[zeeze]

Replaced the controller board and furnace is working as expected. Thank you!

 

[zeeze]

BTW, I have a condensate pump with red and white wires coming out of it. Where do they go on controller board with rest of thermostat wiring?