first M24 failure
Well, after discovering this thread, I'm not going to let it die either! I have a small Weathermatic system, in place for 12 years now, and I just had my first M24 failure; it is dated 1996 and the side case is finally cracking from heat cycles. I have not had a valve failure yet. I have a WM controller, and although I kinda hate it, I have learned to use it. The LCD did go bad after the warranty period, and when I contacted WM, they sent out a whole new controller, they were very very good; this was about 2000. my 2 cents on WM. Kudos to aamartin for not going postal at some point and figuring out a voltage patch.