Lennox 11W46 Furnace Interlock Switch

Product Description

The LENNOX 11W46 is a furnace interlock switch designed to monitor and control access panel or door position on gas furnaces. When the service panel is removed or opened, the interlock switch interrupts the circuit, preventing the furnace from operating in an unsafe condition. This safety component is a standard part of the furnace's control circuit and is typically replaced by a licensed HVAC technician during routine service or after a failed safety inspection. At 0.1 pounds, it is a compact, lightweight component that installs directly into the furnace cabinet assembly.

This interlock switch is used in residential gas furnace applications where door or panel interlock protection is required by the manufacturer's design. It fits into the existing switch mounting location on the furnace cabinet and reconnects to the low-voltage or line-voltage control wiring harness. Replacement is most common when the switch fails to close properly, causing a no-heat condition, or when it fails to open, creating a safety concern during service access.

Key Features

• Interrupts furnace operation when the access panel is removed, providing a critical safety lockout function
• Direct OEM-style replacement for the original interlock switch position
• Lightweight at 0.1 pounds for straightforward handling and installation
• Designed for integration into the furnace cabinet door or panel interlock circuit

Compatibility

Designed as an OEM-style replacement interlock switch for LENNOX gas furnaces requiring the 11W46 switch assembly.

Installation Notes

Installation should be performed by a qualified HVAC technician. Disconnect power to the furnace at the breaker or disconnect switch before removing the existing interlock switch or handling any wiring. Verify the replacement switch actuates and releases correctly with the access panel before restoring power. Follow all applicable local codes and the furnace manufacturer's service instructions during replacement.

Technical Specifications

• Type: Interlock Switch
• Application: Furnace
• Weight: 0.1 pounds

Standard Information

• Brand: LENNOX
• Manufacturer Part Number: 11W46