Integrating this heavy-duty HVAC sensing relay prevents the "phantom cycling" often seen with generic universal replacements

this is the official updated version

Universal Refrigerant Compatibility: Rated for use with CFC

applying a high-quality thermal compound to the probe tip before inserting it into the thermowell is highly recommended

Is the 69W43 compatible with other brands besides Lennox

Copeland 918-0518-01 Heater 30067439-890 Integrating this heavy-duty HVAC sensingThe Copeland 918 0518 01 Crankcase Heater is a critical component for maintaining oil temperature and preventing refrigerant migration during compressor off cycles. This insertion type heater is engineered for a precise fit in 4, 6, and 8 cylinder deep sump compressors, including Copelametic and Discus models. Operating at 240 Volts and delivering 200 Watts of heating power, it ensures that technical lubricants remain at the optimal viscosity required