I just added a high temp limit & low temp switch to my stove too because I kept having issues with either overheating the stove or letting it go out. It is in the basement & I just seem to forget about it too often. I used the old school approach. I used two therm-o-disc type switches. The low temp alarm one is adjustable from 210 degrees to 300 I think. The high temp is set for a cut in of 390 & a CI of 350 degrees. I have it all wired to a 24 volt TX then to a 24 volt buzzer I got for free from work. I have like $20 invested. Oh and I have a switch in series with the power to the circuit so you can silence the alarm or turn it off if you don't want it on like if you are going to be goen for the day so the low temp alarm isn't buzzing for an hour before you get home (we have dogs)