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531 p/n 305812 OpManual for Conveyor Hood 6 OPERATING CONTROLS Controls include a lighted POWER SWITCH and an amber REPLACE FILTER indicator light. Press POWER SWITCH to ON anytime conveyor warmer is operating. When power is first turned on, the REPLACE FILTER light will glow. As the fan comes up to speed and air flow is established, the REPLACE FILTER light will go out. If the REPLACE FILTER light does not go out, the filters must be replaced. However, the fan will continue to operate when the