hi my boiler is turned up full and reads 77 to 82 temp for water yet to have a bath i have to run the hot tap only and can quite easy stand in bath i want to know if there is any way of makeing this water any hoter as dont get much water in a deep bath and even when i wash up i can put hands under hot tap without touching the cold water is there a way of getting hotter water so i can add cold to it to make a full bath, ive tryed turning dials to full but never gets hot hot where i have to add cold has anyone got any ideas