When you're dealing with a faulty Lennox 18K71 Terminal Block

Reznor updated their terminal sizes to meet specific safety requirements

making it compatible with 110V/120V 60Hz power supplies

The Utica-Dunkirk 550002260 Burner Tube is a high-performance replacement burner tube engineered for precise combustion in residential and industrial gas-fired heating systems

as well as multiple WeatherKing and Corsaire models that require a

Modine 5H0797500000 Gas Valve R-407A When you're dealing with aThe Modine 5H0797500000 Gas Valve is a 24v Natural Gas Valve engineered for precise fuel regulation in high demand heating applications. This White Rodgers 36H23 402 equivalent features 3 4 inch inlet and outlet connections, making it a standard choice for technicians servicing Modine unit heaters such as the BTC, BTS, PTC, and PTP series. Designed for 50 60 Hz systems with a 0. 410 amp draw, this single stage gas valve maintains a consistent 3. 5