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                How do I fix f22 error on my Vaillent Ecotec Plus boiler?
                Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
                how do I rectify the fault as detailed below?
                can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
                how to fix water pressure its down at bottom of grey part?
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