Lennox 10W05 L150-20F Limit Switch

Description

Lennox 10W05 L150-20F Limit Switch Overview

The Lennox 10W05 is a factory-specified L150-20F high-limit switch engineered to protect furnaces and heating systems from dangerous overtemperature conditions. Designed as a direct OEM replacement for compatible Lennox equipment, this limit switch provides reliable, automatic safety shutoff to safeguard heat exchangers, blower assemblies, and downstream components.

How It Works

The L150-20F designation defines the switch’s operating parameters: it opens (trips) at 150°F to interrupt the burner circuit when excessive heat is detected, then automatically resets (closes) once the temperature drops by 20°F to 130°F. This automatic reset behavior ensures the system can resume normal operation once safe temperatures are restored, without requiring manual intervention.

Key Features

• OEM Lennox replacement part — SKU 10W05
• L150-20F designation: opens at 150°F, 20°F differential (resets at 130°F)
• Automatic reset operation for convenient, hands-free recovery
• Protects heat exchangers and furnace components from overheating damage
• Direct drop-in replacement for compatible Lennox furnace models
• Durable construction for long-term reliability in demanding HVAC environments

Application

This limit switch is intended for use in Lennox gas furnaces and heating systems that call for the L150-20F specification. Always verify compatibility with your specific Lennox model before installation. Proper limit switch function is critical to system safety — a failed or out-of-spec limit switch can lead to heat exchanger damage, nuisance shutdowns, or unsafe operating conditions.

Why Choose the Lennox 10W05?

Using genuine OEM-specified replacement parts like the Lennox 10W05 ensures your furnace operates within its designed safety parameters. Aftermarket substitutes may not match the exact trip point or differential, potentially compromising equipment protection. Trust the 10W05 for a precise, reliable fit every time.