When i got my boiler installed this winter, it was freezing and the dhw did not seem to get hot enough. when i told the installer he adjusted something at the bottom of the boiler with a screwdriver and the dhw was hotter.
Now in summer, even with the water control on full left, the water is too warm. Did he increase the gas flow? How do i get the setting back to the factory setting as i now realise i made a mistake by asking for hotter water. i have tried looking for some sort of screw but cannot find it.
Does anyone know what he tweeked, and how i get it back to the original setting?
Thanks in advance!