'During the initial use, "snapping" sounds may be heard.
This is normal and the unit may continue to make these
noises the first few days of operation. After the initial break-
in period, only an occasional "snap" will be heard, indicating
the unit is cleaning your air. NOTE: As the air cleaner
electronic cell becomes dirty, it will “snap” more
frequently. When this occurs, you should consider
washing the cell.'
The above content is part of service manual for EAC(page 4)
This is normal and the unit may continue to make these
noises the first few days of operation. After the initial break-
in period, only an occasional "snap" will be heard, indicating
the unit is cleaning your air. NOTE: As the air cleaner
electronic cell becomes dirty, it will “snap” more
frequently. When this occurs, you should consider
washing the cell.'
The above content is part of service manual for EAC(page 4)