Monday - friday from 8am to 5pm. We have received your request we will give you a call during the day to confirm your booking. Check the display on your boiler it could have lights flashing or it might be displaying an error code if it is, find out what it means by checking the manufacturer’s manual. We are responsible for highways drainage this includes the gullies or grids that can be found in the road to take water off the highway. When choosing a combi boiler, it is important to establish.