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                how do I rectify the fault as detailed below?
 
                How do I fix f22 error on my Vaillent Ecotec Plus boiler?
 
                my vaillant boiler is saying a code com on it ?
 
                Why is heating on at night?
 
                can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
 Do you need free help? Ask your question.
                    Do you need free help? Ask your question.