Hi, I'm having a problem with our domestic hot water; we have a Baxi Bermuda backboiler which generates heat to the rads but not to the hot water tank. Water is tepid at the moment. This has been happening since yesterday evening (22/9/04) and we've had nothing altered that could affect the boiler or the plumbing. The pilot light is ok; its blue & steady. Any suggestions before I call in an expert?