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                vaillant ecoTEC plus boiler fault code - how to fix?
 
                how do I rectify the fault as detailed below?
 
                Vailliant turbo max plus 824e?
 
                No hot water, intermittent when air temp drops?
 
                can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
 
                Vaillant eco plus 531 boiler?
 
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                Advice?
 
                Vaillant condensing boiler ecoTEC plus?
 
                how to fix water pressure its down at bottom of grey part?
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