Coleman dgat070bdd furnace NOT Heating.
I kick the thermostat up to get the furnace going and the blend air fan kicks on, Then the igniter and I get A flame for 30 seconds and out it goes, it runs through this twice more then shuts down. I have tried bypassing the limit switch as suggested for someone else having problems, No change with that, I pulled and cleaned the flame sensor again no change. The green light in with the circuit board is steady, This one has a box for the blend air it has A red light and a green one the red one flashes a steady flash no pauses the green light is steady. Any advise will be greatly appreciated. Thank you.