After six (6) months of use, the display will show AF. This is a reminder that it is time to change the air filter. The product will continue to function normally. Pressing any key will reset the reminder for 10 minutes. Once the air filter is replaced, pressing the "On/Off" and "-" keys for three (3) seconds will reset the reminder for another six (6) months.
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After six (6) months of use, the display will show AF. This is a reminder that it is time to change the air filter. The product will continue to function normally. Pressing any key will reset the reminder for 10 minutes. Once the air filter is replaced, pressing the "On/Off" and "-" keys for three (3) seconds will reset the reminder for another six (6) months.