Heil Quaker ICP 1056789 Heat Sequencer providing consistent switching logic and providing consistent switching logic and preventing system downtime caused by carbon buildup or pitted contacts Ensure the process media temperature does not exceed the limits of the copper alloy wetted parts Integrating this furnace sequencer into your maintenance routine mitigates the risk of contact welding or heating element failure caused by improper timing or simultaneous load spikes Common symptoms include heating elements remaining energized after the thermostat is satisfied (stuck closed) or the blower fan failing to kick on despite the elements glowing (stuck open circuit)