YORK P2UR NATURAL GAS Furnace WON'T IGNITE continued The glow plug doesn't glow, gas valve is open, burner doesn't ignite. Furnace runs the induced draft blower motor starts up and comes up to speed but it won't go any further. The draft motor keeps running. The next steps that should happen but doesn't are the venter start up, the hot surface igniter will glow, but these steps do not happen. The control board show a red flashing light that flashes three times over and over again. The thermostat works fine. We replaced the glow plug and the flame sensor. No luck at all. Don't know where to go from here and it is a cold day in Ohio with the first day of snow. Of all the luck. Any help would be greatly appreciated. Thanks