Armstrong 57M66 Furnace Pressure Switch

Armstrong 57M66 Furnace Pressure Switch is a dependable control device for your heating system. This furnace pressure switch functions as a safety interlock, confirming proper venting and gas pressure before ignition, and it serves as a reliable type of pressure switch designed for use on furnaces.

Used On Furnace and part of a standard furnace control circuit, this switch helps prevent unsafe starts and supports consistent furnace performance when paired with compatible Armstrong components. It is a versatile HVAC replacement part that keeps your heating system operating safely.

• Primary function: Safety interlock verifies venting and gas pressure before ignition
• Type: Furnace pressure switch for reliable operation
• Usage: Used on furnace applications requiring a pressure sensor
• Durability: Durable construction designed for long service life
• Installation: Easy replacement for compatible Armstrong units