As a verified Lennox 61M35 replacement part

or replace valve packing to maintain a proper seal

Persistent rattling or grinding usually indicates a loose set screw

Can I use a "close on rise" switch if this "close on fall" switch is unavailable

This unit uses a standard 1/2" NPT threaded connection

Intermatic DTAV40 Defrost Timer R-410A As a verified Lennox 61M35The Intermatic DTAV40 Defrost Timer is a heavy duty, 40 amp electromechanical control engineered for reliable commercial refrigeration defrost cycles. Designed as a versatile universal defrost timer, it features auto voltage technology that automatically adjusts between 120V and 240V AC, eliminating the need for manual jumpers or voltage specific stock. This unit serves as an exact refrigeration timer replacement for discontinued models, including the