The Nordyne 1017207 DC Heater Relay Kit is an electrical control component designed to manage the operation of electric heating elements in compatible HVAC systems. It uses a relay to switch power to the heater when the system calls for heat, allowing the heating cycle to operate safely and reliably. This kit is commonly used with Nordyne electric furnaces and air handlers equipped wi... https://www.partshnc.com/1017207-nordyne-dc-heater-relay-kit