My boiler fires up when all devices are off?
Please help. I am trying to find out why my boiler fires up for a couple of minutes when all devices and hot water are off. Could this be an issue with the wiring during installation? All devices say they are connected. The system works but something is making the boiler fire up at random times…. My heating bill is £800 pcm and I have 21 smart thermostats, hot water kit etc… I have spent a fortune. I had a local plumber install it who hasn’t worked with the product before.