Today I've noticed that push buttons on pumps 1 and 2 on my 4 pump doser not working. Corresponding LED also not works and motor does not run. I've opened doser and
noticed that salt somehow accumulated on lower contact of button and "eated" copper connector. Salt invaded switch that much that inside housing there was a green deposit which prevented
switch to come down. Does someone can give me info where I can purchase replacement push buttons? It would be crazy to discard doser for couple of plastic buttons which doesn't work.