Hi,i have a baxi 105he boiler and yesterday because of a leak i replaced the gland nut and diaphragm. I made sure that the pin and spring were moving ok and screwed it all back together. However,the hot water now only works when the C/H is on. When the C/H is off i get no Hot water and the water LED stays off. I can flick the switch and water LED comes on but as soon as i release it it goes back off. The leak has gone but looks like ive damaged something. Any ideas? Thanks in advance.