Greetings all, I can't believe I am here again.

Anyway, my Lennox G27M is not working again. (it's almost 10 yrs old, a two-stage gas furnace and 80% efficiency.)
This time, the code is saying that the burners fail to ignite.

So I have a hvac tech over and he did some checking with the volt meters (or amp meter). He explains that it is the Surelight circuit board that is the problem as a connection is not holding properly. He even got the furnace to start by pushing the connection so I somewhat believe him.

Now, I am just wondering if it is possible to be something else at faults.

Thanks a lot.

Michael


P.S. I have had issues with this furnace for the past two winters. Basically, the furnace would stop heating for whatever reason but would work again for no reason, see https://www.askmehelpdesk.com/heating-air-conditioning/lennox-furnace-dont-work-cold-54476.html.

Could a faulty circuit board be responsible for this?

((So I have a hvac tech over and he did some checking with the volt meters (or amp meter). He explains that it is the Surelight circuit board that is the problem as a connection is not holding properly. He even got the furnace to start by pushing the connection so I somewhat believe him. ))

Roll with the furnace repair man. No reason to second guess him. When he comes to fix your furnace it is his responsibility to make the repair and warranty his work. If he replaces the board and it does not work that is his problem. If you replace the board it is your problem if that is not the defective part.

Yeah, I am getting the board replaced tomorrow. I really hope this is the cause of the issue and the replacement would be enough to fix it.

The problems you are having with your furnace is the reason I will never have one with a board. My 1982 boiler( Instantaneous) is 82% non condensing. I will sacrifice a bit of gas usage so I do not have to fix it all the time.