I recently moved to a new flat. The hotwater is supplied by a electric heater located in the kitchen which is directly next to bathroom.
In the bathroom, the tap for the shower doesn’t get hot to run a bath. When turned fully hot, it’s too warm for a minute but then decreases to a temperature that it sustains indefinitely. Stopping the tap then starting again repeats this processs.
The heater can be adjust but it needs opening up. The water temperature in the kitchen (the closest outlet) seems fine.
Do symptoms point towards anything specific?