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 has 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 team has come out many times but has never fixed the fault permanently. The boiler was under warranty and I was entitled to maintenance, so I didn’t pay for any of the service visits. Even so, each time, the problem went away briefly and then came back. I now believe my warranty has expired, but this fault occurred repeatedly while the warranty was still active, and it was never resolved. Even so, Vaillant representatives keep calling me, to the point of bothering me, to extend the warranty and sell me paid maintenance, yet they disappear when it comes to permanently fixing the real problem, the F02 fault. This situation has left me feeling wronged and has shaken my trust in the brand. I’m asking Vaillant to permanently repair the F02 fault on my ecoFIT Start combi boiler at no additional charge, and to come up with a solution so I don’t have to go through this same ordeal again because of this chronic problem.