Copeland 918 0056 05 Crankcase Heater 319852 301 The integrated 100 mesh removable strainer The integrated 100 mesh removable strainer allows for internal cleaning without de soldering Industry best practice dictates replacing the burner gasket assembly whenever the burner is removed for inspection or if there is visible evidence of hardening or "heat checking" on the material this OEM Copeland replacement part ensures the lubricant remains at a temperature above the refrigerant's saturation point Technicians should check for continuity across the heater leads with a multimeter or measure for an amp draw while the compressor is in the off cycle