Engineered for HVAC valve automation

Optimized 825 RPM: Matches original fan curve specifications to prevent motor overheating and vibration

A single blink every three seconds typically indicates normal operation and the presence of a steady pilot flame

it utilizes a sensitive diaphragm to detect pressure differentials

Installing it in a 115V circuit will lead to immediate component failure

Lennox 33J34 Limit Switch 340793-762 Engineered for HVAC valve automationThe Lennox 33J34 Limit Switch is a critical safety component designed for precise thermal regulation within Lennox furnace and air handling systems. This genuine OEM furnace high limit switch is engineered to monitor the heat exchanger temperature, automatically opening the electrical circuit to prevent overheating once the internal temperature exceeds the factory set threshold. With a 140 170F automatic reset range, this L170 30F equivalent ensures