Efficient 3-Phase Design: Reduces energy consumption and vibration

Proper installation ensures optimal flame sensing and ignition timing

making it a standard inventory item for technicians servicing residential heating systems

For proper mechanical rotation and alignment

What causes a B1370159 pressure switch to fail

Johnson Controls W42AA-1 Humidistat 323269-701 Efficient 3-Phase Design: Reduces energyThe Johnson Controls W42AA 1 Humidistat is a heavy duty, 3 wire humidity controller designed for precision management of both humidifying and dehumidifying equipment. Engineered with a stable 150 strand human hair sensing element, this unit provides superior sensitivity and long term accuracy compared to synthetic alternatives. It operates on line voltage (120 240 VAC) or low voltage circuits, utilizing a Single Pole Double Throw (SPDT) snap acting