I've had a Quadra Fire Classic Bay 1200 Insert for many years. I primarily run it in thermostat mode using a SkyTech remote. It has always worked flawlessly. However, this year when I went to use the stove it no longer recognizes the thermostat mode. The stove works fine otherwise when I turn it on. Note that I can turn it on and off just fine using the remote, it just won't respond in thermostat mode. Any thoughts?