How do I reset the Filter Check/Reset Light after replacing filters?
With the unit powered ON, press and hold the Filter Reset button for 3 seconds until the light turns off or stops blinking. The light will remain off until the next filter needs replacing. This procedure is the same whether you are resetting the Pre-Filter or HEPA Filter Reset Light. (Page 8)
From the official Honeywell HPA830 Air Purifier manual, page 8
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