We have a Vaillant ecotex 824 boiler it keeps coning up F22 fault it works ok with just the hot water on but when we put the heating on and it go's off it dumps all the water from the boiler and put's f22 on and we have to refill the boiler[/b]
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Vaillant ecotex 824 boiler fault F22
- Thread starter daward
- Start date
Guffed/undersized expansion vessel.
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