Hi Folks, I just thought I would share with you a way to reset your Rheem Paloma WaiWela tankless heater after a descaling procedure. My condensing tankless unit has been in service now for about 9 months and I recently got the "1L" code to descale. I followed the instructions to descale using my tankless service valves and 3 1/2 gallons of distilled household white vinegar. That process went fine and after 1 hour, I flushed the heater and it started right up.
I was however left with the "1L" code on the remote control unit and actually thought the descale procedure would reset this. I tried everything to see if I could get this to reset but no success.
After some research I found the solution.....
You have to take the cover off the heater and identify the circuit board. In the upper right hand corner, there are the DIP switches and below these are 3 buttons labeled "Min" "Max" & "Adj".
With the unit on but not heating water, you press only the "Min" button, then press only the "Max" button then press both together for 5 seconds and release. Power off the remote, then power on the remote. That cleared the code off the screen and re-lit the yellow "Priority" button. Viola! Tankless works perfect
You will not find this in any of the Rheem literature, FWIW....... I hope this helps someone out. I am not sure about any other Tankless brand but Rheem.