Copeland 918-0518-00 Crankcase Heater 30067439-890 The most common causes are

The most common causes are soot accumulation

Dual-Purpose Design: Configurable for either mixing or diverting applications to suit various hydronic and steam circuit layouts

System Longevity: Prevents rapid motor cycling and protects relay contacts from arching and degradation

Technicians typically identify a failing transition gasket by checking for dried condensate streaks or "white powder" residue around the transition-to-collector box joint

Copeland 918-0518-00 Crankcase Heater 30067439-890 The most common causes areThe Copeland 918 0518 00 Crankcase Heater is a critical 120V insertion style heating element designed for Copeland semi hermetic compressors. To prevent liquid refrigerant migration and ensure reliable oil lubrication during cold start cycles, this 200 watt heater maintains a precise temperature differential within the compressor oil sump. Engineering specifications include a 3 1 2 inch diameter insertion probe, matched with a 33 inch conduit length