Morco domestic hot water (DHW) turbine is a flow sensor used in the EUP11RS water heater.
It detects water movement when a hot water tap is opened, sending a signal to the control board to ignite the burner and deliver hot water on demand.
If the turbine becomes faulty or sticks, it can cause intermittent or no hot water delivery. Replacing a worn or damaged turbine can restore normal operation and proper modulation of the burner.