Lennox 22J51 Relay-Sequencer it typically corresponds to this

it typically corresponds to this setpoint range

such as electric heat strips

As a veteran technician knows

Designed for maximum reliability in high-cycle environments

The MARS 61611 and Trane SWT1733 are functionally and mechanically identical units

Lennox 22J51 Relay-Sequencer it typically corresponds to thisThe Lennox 22J51 Relay Sequencer is a critical 24V control component designed to manage the staged activation of heating elements and blower motors in electric furnaces and air handlers. For technicians performing field repairs, the 22J51 serves as the direct replacement for R76726700, ensuring seamless integration with existing Lennox and Allied Air equipment. This HVAC sequencer utilizes factory calibrated time delays to prevent electrical overloads