Lennox 93% Nine year old, no money spent on maintenance yet, but with caveat that I do minor tuneups myself. Also did one free ATCO gas inspection, where they come by and give you a few pointers on maintenance.
Cleaning the flame sensor twice a winter is pretty much normal for me now, will probably splurge on a spare sensor this year just to have it handy. Definitely has its quirks though, it does not always fire up in the exact same way each and every time. I think there is some sort of circuitry in there that will occasionally do a self test regime mixed in with regular cycles.
If I did not know anything about maintenance, no doubt money would have been spent a couple times at least.
Last edited by ZenOps; 01-12-2020 at 08:55 AM.
0.5 gram microsd delivered by 12,000 pound combustion vehicle and driver.