Following a recent installation, Fagone Plumbing, Heating & HVAC was contacted to troubleshoot and resolve heating and hot water performance issues with a Navien combi boiler. Our technicians adjusted system settings, replaced a faulty Moen mixing valve, and verified proper operation of the entire system. We also took time to educate the homeowner on system functionality and controls, ensuring reliable comfort, efficient performance, and long-term peace of mind.