I have a Mt. Vernon E2 purchased new in 2017 that is not responding to the thermostat. It runs fine manually (better than when it was on the thermostat, actually), but the stove is not responding to the thermostat, at all. I hear a "click" in the thermostat when I adjust the temperature, but the stove doesn't do anything. It simply runs until I turn it off. I've replaced batteries in the thermostat, unplugged the stove for awhile and plugged it back in, etc. The dealer in town where I purchased it is no longer in business. I am looking for some troubleshooting I can do prior to replacing things. The thermostat is 80$ on Amazon, and the control board is 300$. Thank you in advance.