47-22861-01 Limit Switches L350 Furnace Bimetal Thermostat

47-22861-01 Limit Switches L350 Furnace Bimetal Thermostat

Key Features

• Bimetal disc design for temperature sensing
• Provides high-limit temperature protection
• Fixed temperature cutout at 350°F (L350)
• Single Pole, Single Throw (SPST) switch configuration
• Designed for use in residential and light commercial HVAC systems

Replaces / Cross-Reference Part Numbers

• 47-22861-01
• L350

Compatibility & Fitment

• Direct replacement for Rheem furnaces requiring part number 47-22861-01
• Fits various HVAC systems that specify a 350°F SPST high-limit switch
• Verify compatibility by checking the part number and temperature rating on the original switch

When to Replace

• Furnace blower runs continuously after the heating cycle stops
• Heating cycle stops prematurely and restarts frequently (short cycling)
• Furnace fails to ignite or produce heat due to an open limit circuit
• The original switch fails a continuity test with a multimeter when at room temperature

Installation Tips

• Disconnect all electrical power to the furnace before beginning installation
• Locate the existing limit switch, typically mounted on the furnace plenum or near the heat exchanger
• Note the wire connections before removing the old switch
• Remove mounting screws and wires from the original switch
• Install the new switch, ensuring it is securely fastened
• Reconnect wires to the terminals on the new switch
• Restore power and run the furnace through a complete heating cycle to verify correct operation