I have Lennox -80MGF-5 (EGC-2) burner unit.
The problem is the heater won't stay on as its should, I read the manual here what I -
1/. Board Diagnostic Paterns - DIAG 1 is Flashing and DIAG 2 in ON
2/. Mode Indication - Limit Switch Open
3/. Remedy - This LED pattern indicates that either the primary or secondary limit switch has open.Both switches are auto-reset.
It seems like it won't auto reset whenever its happen, Please give me your advise what I should do from here *