The Lennox 10W77 Expansion Valve is a critical OEM R-22 expansion valve designed for precise refrigerant metering in residential and commercial cooling systems

This SPST switching component features an integral transformer

Its durable construction is designed to withstand the rigors of industrial environments

these NPT gas valve bushings ensure a secure

Heat Controller 803300301016 Control Board 328140-751 The Lennox 10W77 Expansion ValveThe Heat Controller 803300301016 Control Board is a critical OEM replacement component engineered for precise regulation of HVAC system sequences. Designed as a main control board for specific Comfort Aire and Century units, including the PTHP15A150B series, this board manages the complex timing and operation of the compressor, indoor blower motor, and outdoor fan to ensure optimal thermal performance. In furnace and air handler parts management, this