Precise Fit: Features a mini-style profile for restricted burner ports in modern high-efficiency furnaces

a sticking plunger due to internal contamination

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

It compresses the packing material around the capillary tube or sensor stem to create a pressure-tight seal

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

Johnson Controls A19ADB-38 Temperature Control R-22 Precise Fit: Features a mini-styleThe 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