Furnace Repair - Heat performance tuneup times three systems. Supplied and changed out two, 20 x 25 x 4 filters and 1–16×25×4 filter. Inspect blower’s, evaporators and ductwork. Check all safety features. Hi Limeton rollouts. Tight no wire connections. Cleaned flame sensors and inducer porch. No carbon monoxide or gas leaks. Detected in home. Check thermostats for proper operation. Systems are heating properly at this time.