intermittent flame/gas cut off
I'll do my best to provide all details. This is with regard to a Miller gas furnace; we're using a honeywell digital thermostat (t3200). The symptoms are as follows: The thermo triggers the furnace to power up; I can hear the gas kick on and the flames start blowing, then the gas kicks off prematurely. The power stays on as the furnace "re-trys" this approx. 4 times; finally it just powers down. The fan never kicks on, producing no heat through the house. This happens intermittently. I suspected the thermostat, as the furnace seems to have all the power/gas that it needs. So, I replaced the thermostat. Now same problem. The furnace is only about 8 years old. We generally program the thermo to 72 degrees. Any ideas?