Maintaining the correct exhaust temperature limit is essential for preventing element failure and ensuring compliance with safety standards

soot buildup in the flue

and unit heaters

Repeated tripping of the rollout limit switch usually indicates a heat exchanger failure

depending on the specific appliance BTU rating

White-Rodgers 90-290Q Relay Maintaining the correct exhaust temperatureThe White Rodgers 90 290Q Relay is a heavy duty, 24V single pole normally open (SPNO) switching solution designed for high reliability in HVACR control circuits. As a veteran preferred fan relay, this unit features a Type 84 enclosed design, making it an ideal choice for managing single or two speed fan motors, solenoids, and resistive loads. With a contact rating of 8 Amps inductive and 16 Amps resistive at 125 250 VAC, the 90 290Q provides