I solved my problem simply buying a cheap pump, connecting the level sensors to the Profilux4 and forget about the Doser. Even with a daily evaporation of about 1.7-2.0 liters the Doser would be running for several minutes every time the level sensor was triggered (when it was working) and already making some “unhealthy” noises.
Since I switched to the P4 + pump (cheap small sicce 300l/h pump) I never had any issues again, the pump works for about 6 seconds and turns off. And it is dead silent.
I still have to use an outlet for that pump but it is much more convenient than the multi wire ATOs out there.
Hope your solution works well
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