Vaillant ecoFIT Start F02 Fault Keeps Returning After Every Repair
After I had my Vaillant ecoFIT Start combi boiler serviced in March 2026, it started showing an F02 fault. This fault ha...s kept coming back for about eight months. The F02 error appears on the display, and because of it, we can’t heat our home or get hot water. During this time, Vaillant’s service te