RHEEM 42-21786-8 42-21786-8 Defrost Relay Defrost Relay

Defrost Relay

For replacement part, use this Rheem Defrost Relay 42-21786-8.

RHEEM 42-21786-8 Defrost Relay

The defrost relay is used to replace an existing RHEEM part, and fit the following models: RCBVC, RCBVC-S, RCBVP, RCBVR, REED K40E-007A, REHDB; TYPICAL REPLACEMENT: 3/4" X 1.5"

RHEEM 42-21786-8 RHEEM 42-21786-8 Defrost Relay. It is a genuine Rheem part and made in the USA Rheem features the most complete line of high efficiency gas water heaters, condensing boilers, electric water heaters, compact & standard boilers, solar water heater systems, heat pump water heaters & instant hot water dispenser available in the industry today.

The RHEEM 42-21786-8 defrost relay is found on the following models:

This is an original OEM Rheem part that is available individually. This part is necessary to replace the relay when the thermostat has failed or to repair existing failed defrost relays.

The No. 42-21785-8 acts as a substitute for the no. 42-21677-6 wiring harness relay and includes a fusible link. It is to be used to supply power to the defrost heater on Rheem and Ruud gas, oil or electric forced air furnaces with an external catalytic converter.