Johnson Controls R120AAA-701 Repair Relay Pack R-410A For proper operation and to

For proper operation and to meet most safety codes

You can test this with a multimeter in series

maintaining the integrity of the heat exchanger and burner assembly

Its modular NEMA 1 high-impact plastic enclosure ensures compatibility with other System 350 expansion modules

Johnson Controls R120AAA-701 Repair Relay Pack R-410A For proper operation and toThe Johnson Controls R120AAA 701 Repair Relay Pack is a critical field service component engineered specifically for addressing relay failure within S500 Series Electronic Fan Speed Controllers. This replacement kit allows technicians to restore functionality to AC fan speed control systems without requiring a full controller swap, maintaining precise condenser pressure regulation and head pressure control in HVACR applications. Designed for seamless