HagenKB

Fluval E Heater display

My E Heater is displaying LF, but the flow of water seems OK?

My E Heater is displaying LF, but the flow of water seems OK?
When the LF or "Low Flow" appears on the LCD screen the "E" heater is detecting poor water circulation around the heater. The sensitivity of the system has realized that the water immediately surrounding the heater has become too warm in relation to the heating cycle. While the "LF" appears the heater continues to operate but it is important to note that the even and thorough distribution of warmed water inside of the aquarium could be limited by poor circulation.
To rectify the situation improve the water circulation around the heater and inside the aquarium by redirecting the outlet of a pump or filter so that the heater is in the direct path of the water stream.
Provided that the LF display is temporary and that the E1 display is not showing then this is perfectly normal and nothing to be concerned about.

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