Recently bought a house with a Quadra Fire 1200 for supplemental heat. It would only respond to the thermostat if I manually moved it up or down. The local tech said the thermostat was not sensitive enough, so I did the adjustment he recommended and it would turn on when the temperature dropped below the setting. However, when the temperature exceeded the setting, it did not turn off. He recommended a new thermostat. Installed new thermo and am still having the problem. Comes on fine, but has to be manually turned off by moving thermostat setting to a few degrees below requested turnoff setting. Put another thermometer in the room and the temperature is exceeding turnoff setting. Any other ideas?