Lennox 18H01 Limit Switch 321894-709 While designed as a line

While designed as a line voltage controller for 120V to 277V systems

Common Questions Is the 196983 compatible with Natural Gas units

Precision Balanced: Factory-aligned 12x12 wheel reduces mechanical noise and prevents heat exchanger overheating

OEM Compatibility: Exact fitment for Lochinvar and A

improper auxiliary heat engagement

Lennox 18H01 Limit Switch 321894-709 While designed as a lineThe Lennox 18H01 Limit Switch is a high precision OEM replacement part engineered for critical thermal protection in heating and air conditioning systems. This specific L140 40F limit control is designed to monitor internal temperatures with an auto reset function, automatically breaking the electrical circuit if temperatures exceed the 140F threshold and restoring operation once conditions drop to 100F. Built with a rugged housing to withstand the