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Mend Vaillant Gb Boiler

I can not get C/Heating on VCW GB 242 EH Vaillant Combi Boiler ?

I have just renewed the Divertor valve on my combi I have hot water while switch is in Summer mode, but when I switch to winter mode I do not get heating nor H/water I have checked the wiring and noted I have not got power between 3-4 on terminal block.I know this should be live when demand is asks for would it be PCB or anyother fault.

Ted lambert
August 2008
did you find a solution to this?i had the same problem as well

n.brown
September 2008
I have same issue as this, if you know how to fix or can offer any advice, please email me steviewhy83@aol.com thanks!!!!!

I've tried changing the pump etc but no luck!

Steve Whyatt
September 2008

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