The Rheem-Ruud 47-21663-01 Limit Switch is a high-precision

the 45M67 is a verified replacement part for Lennox G43UF and G41UF models

the 0-10V setpoint output is DIP switch selectable to function as either a temperature setpoint or a fan speed controller (Off

Operating at 1075 RPM on 230V single-phase power

Lennox 10W50 Electric Heater 318518-761 The Rheem-Ruud 47-21663-01 Limit SwitchThe Lennox 10W50 (Model PHK15CP 1) is a critical 15kW electric heater kit specifically engineered for secondary or emergency heating in dual fuel and heat pump configurations. Designed for 208 230V single phase operation, this unit delivers up to 51,200 BTUh, ensuring consistent thermal performance during defrost cycles or extreme ambient drops when the primary compressor loses efficiency. This OEM Lennox heat kit features a heavy gauge steel element