Hello folks, I have had some strange issues with my natural gas furnace. I have the thermostat set to 70 degrees to kick in heat. The swing on the thermostat is 1.5 degrees. Furnace will kick in and get to 70 or so and the turn off, so far so good. So the next time the furnace triggers to come on, the glow stick will light up, the gas turns on, and we get a flame for about 3 seconds (once the glow stick turns off). This happens three times and then stops. The temp will then drop to very cold levels, and we will have to manually flip the furnace power switch off and on to get the furnace to "wake up". The furnace will stay on and heat the house until it hits 70 or so. While the furnace isn't working, HEAT is shown on the thermostat. I just desired the thermostat to make sure the connections were good and tight. Filter on unit was changed a week ago, in repo se to this issue Anyone have any idea what is going on ?