Goodman GMS90703BXA Heater "model gmp075 3 light blinks" Questions

...model number gmp075-3. when the t-stat calls for heat the fan turns on and the status light flashes 5 times, which is false flame sensed. i have replace the ignighter and jumped all the the sensors ...

...GMP075-3 The thermostat was in the off position over night and sometime during the night, the induced blower and blower motor came on. The trouble light on board blinks 5 times. I checked all safety ...

...GMP075-3 will start and fire for about 1-2 minuites then the gas valve will close and the unit will not restart. When I test voltage accross the valve and it read 0. So I powered down the furnace ...