NoelleCole We have watched the video you sent carefully. The red light reminds you to replace the filter.Please remember to reset this air purifier after replacing this filter.If your purchased air purifier is AirMic 4S/ Apollo 718/ Cayman 608 Air Purifier, please press the button of "filter reset indicator" for 3 seconds (not 3 times).
Please rest assured that if this issue can't be solved,we will give you a perfect solution.