[Lifetime Warranty] 20162904 Furnace Primary Limit Switch 150°F to 110°F

20162904 Furnace Primary Limit Switch 150°F to 110°F - Replaces 20162904 L40-524

Key Features

• Primary high-temperature limit switch for furnace safety
• Automatically opens the circuit at 150°F (65.6°C)
• Automatically closes the circuit to reset at 110°F (43.3°C)
• Functions as a safety control to prevent furnace overheating

Replaces / Cross-Reference Part Numbers

• 20162904
• 20162904S
• L40-524

Compatibility & Fitment

• Designed for specific Goodman furnace models
• Compatible Models Include:
• Always verify the part number on your existing switch or in your furnace's service manual before ordering.

When to Replace

• Furnace blower runs constantly without a call for heat
• Furnace short cycles (starts and stops frequently)
• Furnace fails to produce heat
• Diagnostic codes indicate an open limit switch

Installation Tips

• Disconnect all electrical power to the furnace before beginning any service.
• Photograph the existing wiring connections before removing the old switch for reference.
• Ensure the new switch is securely mounted in the original location.
• After installation, restore power and verify the furnace cycles correctly.