Lennox 18K65 Control Limit — OP200 / CL160
The Lennox 18K65 is a high-limit safety control designed to protect furnaces and heating systems from dangerous overtemperature conditions. With an open (trip) point of 200°F and a close (reset) point of 160°F, this control automatically interrupts the heating circuit when temperatures exceed safe operating thresholds, then resets once the system cools to the specified cut-in temperature.
Key Features
- Open (trip) point: 200°F — shuts down heating circuit on overtemperature
- Close (reset) point: 160°F — restores circuit once system cools
- Genuine Lennox OEM replacement part (SKU: 18K65)
- Designed for use in Lennox furnaces and compatible heating systems
- Provides critical overtemperature protection to prevent equipment damage and fire hazard
- Direct OEM replacement ensures proper fit and reliable performance
Application
The 18K65 limit control is a direct OEM Lennox replacement component used in residential and light commercial furnace applications. It serves as a primary safety device, monitoring heat exchanger or plenum temperatures and cutting power to the burner or blower circuit when unsafe conditions are detected. Using a genuine Lennox part ensures compatibility, correct temperature calibration, and long-term reliability.
Why Choose OEM Lennox Parts?
Genuine Lennox replacement controls are engineered to exact factory specifications, ensuring proper trip and reset temperatures are maintained. This protects both the equipment and the end user, reducing callbacks and warranty concerns for HVAC professionals.
