boiler over heat

Good afernoon, I recenlty extended the house and added a small area of UFH to the main heating (radiators) system. Since the installation, the boiler randomly overheat and shut down. This only happens when the UFH starts, mainly in the mornings and especially if it starts at the same time as...

Hi there everybody, this is my first post here. Hopefully I can get some help please? Last weekend I swapped the radiators in my upstairs bathroom and en suite for towel radiators but I now have uneven heat, banging and crashing sounds, the boiler is cutting out (assuming over-heating), and I...