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Heater malfunction - EE displayed


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From the manual: 


I do not own one of these, however, there's a controller inside there and sometimes that can get squirrelly.  I would suggest "rebooting" the heater.  Probably unplug it and leave it for 20-30 minutes then plug it back in. 

Edited by jwcarlson
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On 5/10/2023 at 5:18 AM, MDfish said:

Last October I ordered and began using the 100w Aquarium Co-Op heater.  Loved it.  This morning it began malfunctioning (I assume) and alternately displaying 73 and EE.  I put another thermometer in the water which is reading just over 74.  Any thoughts?  Thanks!

The first batch of heaters had a discount and would display a code when the heater reached a certain service life.  Those details are in this thread.  I would reach out to support and try to understand what is going on.  Could be a malfunction based on the above chart.


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