Vaillant boiler f22 fault

How to Fix Vaillant Boiler F22 Fault Code Repair

The Vaillant F22 fault code indicates low boiler pressure so it must be repressurised to fix it. The first thing you need to do is check the pressure gauge and if it’s low, repressurise it until it’s at 1 to 1.5 bar. I have been repairing boilers for over a decade and this is how

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