boiler is working fine but when it fires up about 3am to heat up the internal tank it is really noisy-----runs for a minute and shuts down. When firing up for normal operation at 6am it is as usual nice and quiet. I realise the house is very quiet at 3am but i get wakened up by the noise. Think I will have to put it on econ mode to stop this unless anybody can advise me on the problem
thanks
thanks