Lennox 23X17 Control Board 30067439-890 this submaster controller allows for

this submaster controller allows for both Direct Acting (DA) and Reverse Acting (RA) configurations

this brass boiler relief valve provides a 510

0570 orifice

This is an H-series bushing featuring a 1-inch bore diameter

Lennox 23X17 Control Board 30067439-890 this submaster controller allows forThe Lennox 23X17 Control Board, also identified as the Lennox 620244 02, is an essential demand defrost control designed for high performance heat pump systems. Built to replace previous iterations such as the LEN620244 02, this board integrates multiple critical functions into a single 24V module, including demand defrost logic, a defrost relay, and an anti short cycle timed off control. It features a sophisticated pressure switch system lockout