I believe that 272848 is the same product as V4043H1056.
ref http://www.heatingcontrolsonline.co.uk/ ... -p-87.html
I am trying to replace the powerhead with 40003916-001, which is a replacement powerhead matching this valve according to the instructions with the powerhead and this url
http://www.heatingcontrolsonline.co.uk/ ... -p-85.html
I have removed the 2 screws attaching the old powerhead to the valve and expected the head just to lift off, but it seems to be firmly secured around the activator mechanism. Is there something else I need to do before I can remove the head?
Many thanks for any help anyone can give.