Check Filter Indicator
The ability of any humidifier to efficiently supply humidity output relies heavily on the
condition of the filter. As the filter loads with impurities it gradually loses its wicking
capability. When this happens, moisture output is reduced and the humidifier has to work
longer to satisfy the selected setting. This humidifier has a check filter reminder timed to
appear after 720 hours of operation. When the Check Filter (CF) message is displayed,
disconnect the power cord and check the condition of the filter. If a build-up of deposits or
severe discoloration is evident replace the filter to restore maximum efficiency. The CF
message is reset when the humidifier is plugged back in.
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