Thanks,
I'm not too concerned about the noise, I just want to wake up in the morning to find that my heating has come on instead of waking up to a freezing house and a cold boiler with flashing lights (showing ignition lockout). I have to reset it a number of times before it starts to work...
Thanks, would that cause the ignition lockout? The lockout just occurs when the boiler is starting for the first time from cold; the bang occurs every time the ignition the boiler fires up, just before the sparking.
On most days, usually in the morning and evening when the boiler is programmed to come on from cold, this happens:
The timer is programmed to turn on the CH and HW from 06:00- 09:00 and 16:30-22:30.
The fan starts. APS operates, the ignition sequence starts (I can hear a tick-tick-tick...