Common Questions: What is the difference between an 'L' and 'F' White-Rodgers control

Technicians should cross-reference the part number on the heater kit data plate or the model number of the furnace

and Kenmore

Use an ohmmeter to check resistance

Lochinvar & A.O. Smith 100135300 Main Burner 30067439-890 Common Questions: What is theAs a veteran technician, you know that maintaining high efficiency combustion requires precision components. The Lochinvar & A. O. Smith 100135300 Main Burner is the direct OEM replacement burner for failing or carbon fouled units in commercial water heaters and boilers. This specific gas burner assembly is 100% identical to the BNR3417 and is engineered for Lochinvar Copper Fin and EnergyRite models, specifically those within the 400,000 to 750,000