Vaillant are a highly respected manufacturer of boilers, but inevitably things go wrong from time to time. If you find yourself in this position, we have plenty of information on the Vaillant F22 boiler errors, as well as other possible Vaillant faults.
The problem with fixing boilers is twofold, firstly they’re incredibly complex machines, and it takes a long time to fully understand how they work, and a lot of investment in the required training. Secondly, not just anyone can fix the problems that are associated with boilers, they can only be modified by trained Gas Safe engineers by law. If you try to fix it yourself you may be breaking the law, and putting yourself and your family at risk.
Often, fixing Vaillant F22 boiler errors is straightforward, but if you don’t know what you’re doing, always seek help.
Here’s Boost Plumbing’s explanation of dealing with the F22 fault if you’re comfortable to do it yourself: