YOUR SHOWER REQUIRES A CERTAIN AMOUNT OF PRESSURE TO OPERATE (USUALLY AROUND 1Bar). IF YOU TURN THE SHOWER FLOW DOWN YOU REDUCE THE WATER PRESSURE WHICH MEANS LESS WATER TO HEAT - WATER GETS TOO HOT - POWER TO HEATING ELEMENT CUTS OUT-WATER GOES COLD.TRY REDUCING TEMPERATURE SETTING BEFORE TURNING FLOW DOWN.
