Diane thanks for your reply, my brother has just sorted this out for me & he said you need a long flat ended screw-driver & underneath as you said he said you have to shut off one of the valve's then open the other and this has solved this problem.
Shelly ( BFD )
February 2009
shelly
I'm currently having enormous problems with a new Vaillant boiler and top-up problems-been going on for a couple of months. Have you checked underneath the boiler?-there should be two switches-one to the left and one to the right?
Diane
February 2009
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