automatically breaking the circuit to the compressor or activating the heating cycle when temperatures drop below the calibrated set point

preventing shifting and excessive mechanical vibration

Common Questions Is the 971-0329-04 compatible with all Copeland compressors

utilizing the same mounting footprint and power requirements for a streamlined swap

Complete Install Kit: Includes the valve

Resideo RC845 Relay R-22 automatically breaking the circuit toThe Resideo RC845 Relay is an essential heat pump add on relay engineered for integrating modern heat pumps with existing fossil fuel furnaces. Professional contractors rely on this switching relay to manage the handoff between high efficiency cooling and auxiliary heating sources, such as gas, oil, or electric furnaces. This AddOn Fossil Fuel Relay features a low voltage dry contact output for triggering auxiliary heat and a dedicated line voltage