Goodman GMS90703BXA Heater "turn heat flashes ignition failure" Questions

...heat. This could be from a gas valve closing slowly or a burner flame lingering. Read seven LED flashes as a warning of a low flame sense microamp signal. This could happen with a coated flame sensor ...

...heat. This could be from a gas valve closing slowly or a burner flame lingering. Read seven LED flashes as a warning of a low flame sense microamp signal. This could happen with a coated flame sensor ...

...heat. This could be from a gas valve closing slowly or a burner flame lingering.Read seven LED flashes as a warning of a low flame sense microamp signal. This could happen with a coated flame sensor ...

...heat. This could be from a gas valve closing slowly or a burner flame lingering. Read seven LED flashes as a warning of a low flame sense microamp signal. This could happen with a coated flame sensor ...

...failure I have coleman Model # DGAT070BDD. I am starting to get a one gree flash, meaning my igniter is not working. I have turned off the power to the circuit board then back on and then the furnace ...

...flashes for 'flame failure or blocked condensate drain'. If anyone could advise us on anything we can try before calling someone out we would be very grateful. And sorry if my explanation sounds very ...

...heat not to work (we didn't test the heater after the A/C fix - I learned something there). It's definately not a pressure switch stuck open (though I guess it could be a faulty pressure switch). ...

...turn off power to the unit , after 20 or so seconds after turning on the power and uping the thermo it will light until the next heat cycle , then it will start all over again ----sometimes i can get ...

...turn it on for the first time this season and nothing. No heat, no noise, nothing (when it is working properly I can hear the exhaust blower humming before the ignitor ignites the gas and then the ...