I have a Lennox G51MP furnace.About 6 years old.It can't start. Red and Green Led alternating fast flash. I cut off the power and then turn on. Do it several times. The furnace can run normal several times combustion and idleness.Then it is out of work again.2 Led alternating fast flash again. I have changed the thermostat. Situation is same.
What part is my furnace out of work? My email:[email protected]