We have a combi boiler that was fitted 1 and a half years ago. On Thursday the boiler started leaking water and we had to switch it off. We have a guarantee on the boiler so called them and they came out today. They said that the problem is that the condensate pipe wasn't correctly fitted, so in the heavy rain last week the water backed up and flooded the boiler. He said some of the parts might be okay once they've dried out but to repair it will be well over £1000 in parts alone. We've tried to get in touch with the installer but he is away on holiday. Meanwhile we have no heating or hot water and we have 2 children in the house, including a baby. What's our best course of action here? Do we need to wait till the installer comes back and try to make him fix it as it was his fault, or could we pay to have it fixed and claim the money back? It will make things tight financially if we have to pay and can't get the money back.