Look out! Called Robs Albertan today to have a tech come look at my furnace which was not heating. Not my first choice as I have had work done in the past and since been pestered by their call centre and junk mail, but no one else was available. Tech came, was in furnace room for at least 45 minutes, comes out to tell me the flame sensor has failed, which in turn has damaged the gas valve and will likely have damaged the control panel as well, though that wouldn't show up for a few months. Cost? About $800 to fix the two parts that were "broken" today and if the control panel goes in a few months and supposedly this is likely, that'll be another $900. So the tech says, since you're halfway to the cost of a new furnace, why don't you talk to a comfort advisor about replacing your furnace? Yikes! I talked to some friends who thankfully have more knowledge about furnaces than I and each one said that sounds like bs, take the flame sensor out and clean it and see if that fixes your problem. So what do you know, husband removes flame sensor, it's clean as a whistle, reinstalls it, start furnace and it's working great! Huh. Yep, I do feel like I narrowly missed being tricked out of at least $800 or as much as the cost of a new furnace.