According to the symptom analysis may be oven-grill heater control circuit or malfunction.F9nservice manual download site

Referring to the drawings inspection barbecue control circuit is working properly, the fault in the barbecue or heater connection circuit connectors. Off, measure the resistance heater H barbecue joints between two infinite, the normal resistance of about 24Ω, Judging, H has burn. grill heater mounted on top of the furnace, consisting of two equal power quartz heating tubes in series. demolition baked shell, quartz heating tube 1 was observed at both ends of black, measurements have been blocked, indicating that the tube aging burned. after replacing the tube, troubleshooting.F9nservice manual download site