$119.95 Furnace Tuneup. Replace #35Wp, Feed Tube, , Ez-Flex #24. “Furnace†4= T-Stat, 52 Ohms HSI, Flame Sensor, 2= Stage 90% Inducer, Electric, 1.5†& 3.5†W.C. Gas Valve, Drain Trap, V.S. Blower, 33* Outside, “Humidifier†Hum-Stat, Bypass Damper Open, Scale Control Insert, Water Valve, Cycled Clean And Check.