Lennox 15D55 Control Board R-22 The Nordyne 669566R Expansion Valve

The Nordyne 669566R Expansion Valve is a critical metered flow component designed specifically for high-efficiency cooling systems using R410A refrigerant

Key Benefits Ensures optimal heating performance by maintaining a consistent and efficient flame pattern

you know that using a genuine Lennox OEM part ensures the mounting footprint and wire leads match the original LB-74930 specifications

reducing labor time during pump replacement

Lennox 15D55 Control Board R-22 The Nordyne 669566R Expansion ValveThe Lennox 15D55 Defrost Control Board is a critical OEM replacement component engineered to manage the complex defrost cycles of Lennox heat pump systems. As a veteran technician knows, maintaining the integrity of the outdoor coil is paramount; this board utilizes advanced demand defrost logic to monitor coil and ambient sensors, preventing efficiency robbing frost buildup. With high temp ratings up to 105C and a robust 47F capacitance, the Lennox