Fault light means it didn't light off on propane.
Could be:
High temp t-stat has tripped........push reset button (outside compartment rubber cover.....right button)
Could be spark electrode....bad electrode, dirty electrode, electrode out of position, high voltage wire shorting to ground, cracked ceramic
Could be dirty burner tube, dirty main orifice, misaligned burner tube
Could be dirty combustion/exhaust chamber
Could be low DC voltage
Could be low propane pressure
Could be dirty contacts/connector on circuit board
Could be loose wires on t-stats..or gas valve
Could be faulty gas valve
Service Manual Your model is same as SW10DE)
