conant47f wrote:
Can not get main burner lit
Do you have a 1lb. propane torch?
Heres my drill for standing pilot appliances: Turn off gas valve for the required 5 minutes. Turn knob on gas valve to "pilot" position. Ignite pilot flame with torch while directing torch flame onto thermocouple (it usually changes color) and turn gas valve to "on" position with thermostat set for high temperature. The main burner should ignite because the thermocouple has been heated. If main burner does not ignite, the orifice and burner tube may be dirty/clogged. If the main burner does ignite but the pilot does not remain lit, the thermocouple may be bad or pilot flame not adjusted/directed onto thermocouple, or pilot orifice or tube plugged/bent. If all the above remedies don't work, time for a new gas valve and inspection/adjustment of the main gas pipe and regulator.
Good luck with the furnace.