18J27 | LIMIT 140F out 110F in | Lennox

Lennox 18J27 Gas Furnace Limit Switch The Lennox 18J27 Gas Furnace Limit Switch is a critical safety component designed to prevent overheating in your heating system. This highly sensitive switch monitors the temperature within the furnace and automatically shuts off the gas supply if it exceeds safe levels. Featuring a durable construction, the 18J27 limit switch is built to withstand the demanding conditions of a furnace environment. Its precise operation ensures that your furnace operates safely and efficiently, preventing potential fire hazards. By replacing a faulty limit switch with the genuine Lennox 18J27, you can restore the safety and reliability of your heating system. Trust our HVAC supply store for the best prices, fast shipping, and exceptional customer service. Upgrade your furnace today with the Lennox 18J27 Gas Furnace Limit Switch and ensure the safe and efficient operation of your heating system.