Description
The Lennox 49L88 is an automatic reset high-limit switch engineered to protect furnaces and heating systems from dangerous overheating conditions. When supply-air temperatures rise beyond the safe threshold, this limit switch interrupts the burner circuit and automatically resets once temperatures return to the normal operating range — keeping your system running reliably without manual intervention.
Key Features
- Auto-reset operation — no manual reset required after the system cools
- Trip (open) temperature: 185°F
- Reset (close) temperature: 155°F
- OEM Lennox replacement part — ensures proper fit and function in compatible Lennox equipment
- Protects heat exchangers and furnace components from thermal damage
- Designed for reliable, long-service-life performance in residential and light-commercial furnace applications
Application
The 49L88 is a direct OEM replacement limit switch for select Lennox furnace models. It monitors supply-air or heat-exchanger temperatures and opens the burner control circuit if an overheat condition is detected, preventing damage to the heat exchanger, blower components, and surrounding structure. The automatic reset function restores normal operation once temperatures fall back within the safe range, minimizing downtime and service calls.
Specifications
- Brand: Lennox
- Part Number: 49L88
- Switch Type: Auto Reset (Automatic)
- Open (Trip) Temperature: 185°F
- Close (Reset) Temperature: 155°F
- Application: Furnace high-limit protection
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