Ge dryer DVL223GB4WW Not staying lit

Have Ge gas dryer model number DVL223GB4WW and it will only stay lit for about a minute, then flame goes out and still tumbles, but no heat. Checked sensor and it is open, .3 ohm across wires, ignitor tests 63.5 ohm at about 70 degrees in home temp. Vaccuumed all vents and retried few times. Checked connectors and reconnected, still same thing. By schematic, control thermostat has 7k ohm resistance across pink/blue wire and continuity between all other pink/orange wires and high limit thermostat has continuity when dryers unplugged. Any ideas???