Furnace Ignition Question
I am helping a friend troubleshoot a Suburban LP furnace. When the furnace starts it take several ignitions cycles before it stays running. The furnace "lights" for a fraction of a second (a puff of...
Forum Discussion
ILVMYGT wrote:
The burner was removed, cleaned and blown out with compressed air. While the burner was out the inside of the "combustion chamber" was vacuumed out.
The connector for the electrodes and gas solenoid at the control board was cleaned. While starting the little bulb on the control board flickers when the electrode sparks.
The electrode was replaced with a new one with the correct gap. Before reinstalling the electrode the high voltage wire was connected to it and spark was verified.
This is an older furnace (1993). A review of the schematic there does not appear to be a separate sensor that detects the flame.
The burner jet has not yet been cleaned. But you can get slight gas smell when it first starts.
The burner Jet(orifice) should ALWAYS be removed and checked and cleaned out when accessing the burner. If a microscopic debris is in the gas valve/orifice area. it can be "pushed" outward and restrict the LP flow. You need to do this before proceeding further. Doug
