I have a Payne gas fired heater, with an A-coil on top. Condenser outside. Split system. System stopped providing heat, fan stays on. Had extremely filthy filter (now clean), fan housing, and motor were dirty, cleaned everything perfect. Problem light blinks 3 long, 3 short, continually. Flame roll out switch is okay, does not need to be reset. Now, I can't get anything from the system, wheather on heat, or cool.