gas burner fires up, then shuts off after 10 sec

gas burner fires up, then shuts off after 10 sec

gas dryer starts correctly and burner starts properly but shuts off after 10 seconds or so. replaced thermistor, (turned out not necessary, ohm reading good) ohms on thermal fuse good. completely blew out all lint from dryer with air hose, reinstalled. no change

ANSWERS: