Corrosion Resistance: The chrome-plated brass body and copper thermostat assembly provide superior durability against harsh hydronic environments

and steel hydraulic or refrigeration tubing

This OEM replacement part is engineered to monitor the outdoor coil temperature and initiate the defrost cycle

which restores the circuit once the unit cools back down to a safe operating level

Key Benefits Precise Thermal Protection: Engineered with a 175°F opening threshold to prevent heat exchanger damage and ensure safe operating parameters

Williams 9A409 Pilot Bracket Corrosion Resistance: The chrome-plated brassThe Williams 9A409 Pilot Bracket is a critical structural component engineered for precise pilot assembly mounting in Williams Monterey Top Vent Furnaces. This heavy duty mounting plate ensures the correct alignment of the pilot burner, thermocouple, and thermopile relative to the main burner port, which is essential for consistent ignition and reliable flame rectification. Built from high strength alloy steel with a corrosion resistant coating, the