I have an Intertherm furnace model mmha056aahr05. Glow plug lights burner starts then shuts down. 3 blinking lights on the code says gas valve error or false flame sensed. Any ideas on problem solving or where can I get a manual
Thank You

I have an Intertherm furnace model mmha056aahr05. Glow plug lights burner starts then shuts down. 3 blinking lights on the code says gas valve error or false flame sensed. any ideas on problem solving or where can i get a manual
Thank You

Clean flame sensor with steel wool or sand paper.