Hi I have a problem with my boiler and have no hot water - the heating still works but the l.e.d for hot water is not even lit. Although there is no fault light flashing. I had a look online for any explanations and saw it might be the diaphragm. I've had someone out this morn who said its not the diaphragm, it needs a new diverter valve costing £127+vat and £40 to fit. Also my friends hubbys friend has said (without even looking at the boiler) it will def be the diaphragm and will cost £65 for part including fitting! So now im totally confused. For a start if it was the diaphragm I read that these were only £10 and could be fitted in a couple of mins. Can anyone shed any light? The boiler is a baxi 105e combi boiler. Thanks.