Gordongas you are the man!! That is exactly what was wrong. Thank goodness I didn't take the "strip down and replace option" tee hee Thanks again and if I can be of any help to you please give me a shout. :) :) :)
Ideas please re my just over 2 year old Worcester Bosch Greenstar 37 CDi. After running hot water to a sink or bath, if I want to top up, even after a few mins the water runs cold for quite a while (40secs approx) until it runs hot enough to use. This started about 2 months ago and is getting...