Resideo RA89A1116 Relay 321042-401 bird nests or debris in

bird nests or debris in the venting

such as a soot-clogged secondary heat exchanger

This valve utilizes 1/2" Inlet and 1/2" Outlet ODF sweat connections

or moisture exposure

This thermistor-based sensor is a direct replacement for various superseded part numbers

Resideo RA89A1116 Relay 321042-401 bird nests or debris inThe Resideo RA89A1116 is a professional grade switching relay designed for contractors who need a reliable interface between a low voltage controller and high voltage HVACR equipment. This 120V unit features an integral transformer that provides the necessary 24VAC power for your control circuit, eliminating the need for an external power source. Built with a single pole single throw (SPST) configuration, it is ideal for switching circulator pumps,