That sounds like the board may be the problem. Is it easy to get one of those? Or am I better off calling a service company that deals with Lennox? (We do Carrier). Here is ...
Replies 8Nope, it's not the first time to run it. The furnace has been working fine this year for about a month (off and on use), it just started doing this two nights ago. I put a n...
Replies 8