Question: How do I change the filter on my HPA300?
Answer: Please refer to your Owner’s Manual for complete instructions on how to change your Honeywell True HEPA Replacement Filter R.
Question: How do I reset my Check Filter or Check Pre-filter light?
Answer: After you change your filter, the “Check Filter or “Check Pre-Filter” light will remain on until it is reset. With the unit powered on, press the lighted button, and hold for approximately 2 seconds until the light turns off. The electronic filter check is now reset.