I went on a service call today on a triangle tube solo 110 and the complaint was very hot domestic water. Get there and boiler was cycling off of high limit. The dhw and radiant pump was running with no dhw and radiant call. This house was it by lightning this morning.
I would start by powering down the unit and resetting it. Then I would pull the heat and dhw switch wires to be sure you don't have a smoked switch somewhere else in the system. I would also go through the setup codes and make sure they are at factory defaults.
Chances are, the lightning smoked the controller and you need a new one.