The internal nitrile (NBR) seal material ensures reliable shutoff and chemical compatibility with non-corrosive media

It is critical for technicians to verify the part number compatibility against the water heater rating plate

Universal Compatibility: Fits Nordyne

55 inches water column switch is a primary check point to verify inducer motor efficacy and flue integrity

this specific part number is generally utilized for units produced before serial 1707

Johnson Controls A19ADB-38 Temperature Control R-22 The internal nitrile (NBR) sealThe Johnson Controls A19ADB 38 is a high limit mechanical temperature control engineered for precision in demanding HVACR environments. This remote bulb temperature control operates across a wide 100 to 240 degree F setpoint range, providing a critical safety layer for hot water boilers and air heating systems. Utilizing an SPST (Single Pole Single Throw) switch configuration, the unit is designed to open high, effectively cutting power to the circuit