induction fan of lux air furnace turns on, ignitor turns on and reaches 2300 degrees, furnace lights, ignitor goes out, furnace goes out - after a few minutes furnace tries to recycle - this repeats as many as five times, furnace goes on lock-out, will not light - must physically turn off power to furnace at switch in basment or thermostat cobntrol, wait a few minutes, turn power back on to furnace, try again - furnace will then run awhile, takes two cycles to run at times and produce heat - what to do?
have cleaned flame sensor and had same checked for cracks, checks out okay - please advise
have cleaned flame sensor and had same checked for cracks, checks out okay - please advise