I have a bar shower, that's off a combi boiler. The hot water has been getting increasingly cooler over the past few months, and now the max temp just isn't hot enough. I have researched and I think there is a gizmo inside the bar that will allow me to adjust the temperature. Is this something I can do safely, or should I wait until I can call a plumber when we are out of this current situation? Many thanks. Lucy
