Have you wondered why no one has responded ?
I would say the fact is you can't seem to tell the difference between a Heating boiler, a bath or shower.
This question should be in Heating subsection Home heating
bob uk
May 2014
Automatic Answer
While you wait for answers, we may have found some information which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix baths and showers.