Ensure dependable over-temperature protection with the Lennox 78W99 (part number 102135-13) high limit control. Designed to open at 235°F, this OEM component serves as a critical safety feature in compatible Lennox heating systems, helping to prevent overheating and system damage.Engineered for consistent performance, this temperature limit switch monitors heat exchanger temperatures and interrupts burner operation if temperatures exceed the set threshold. Built to Lennox's exacting standards, the 78W99 provides long-term reliability and easy compatibility with a wide range of Lennox gas furnaces and HVAC units.Key Features:
- Genuine Lennox OEM part
- Opens at 235°F for high-limit protection
- Ensures safe furnace operation by interrupting the burner at high temperatures
- Part Number: 78W99 / 102135-13
- Compatible with select Lennox models (check your unit’s documentation for fitment)