Rheem Furnace Parts 42-21786-81 Defrost RelayDefrost Relay for Rheem furnace parts 42 21786 81 delivers reliable defrost operation and dependable performance in HVAC systems. As an AC operated defrost relay, it handles multiple configurations for versatile control, including (2) DPDT and (1) SPST with NO NC contacts. The coil voltage is 24 Volt AC at 50 60 Hz, making it compatible with standard furnace wiring and control boards. Key specifications include contact voltage ratings of 120 277 600

Electrical specs: 35/5 µF

this capacitor stands up to common electrical swings and ensures longer system life

Built to perform in demanding environments

Clearly labeled with part number Lb-94724aa for fast ordering

Compatibility with common HVAC control boards as a replacement part

Designed for durability in residential HVAC installations

Enclosure & Construction: NEMA 1

Designed for use on standard combination gas control valves

ensuring dependable performance across seasons

and electrical connections

Terminals: Large spring contacts with mid-point ground for secure connections

Temperature rating: 300°F