Hi. I noticed the other day that my thermostat was rising far beyond the settings for the heat would not kick off. So I replaced it and found that that new thermostat was doing the same. It's a gas furnace. I am wondering if anyone else has ever had this problem. I do not believe it's the thermostat because as I explained before I changed it and it didn't seem to help. There was no change in the problem. Thanks in advance.