I have sold a motorhome privately, but the buyer has come back a week later saying the dual fuel water heater is leaking and the gas does not work on it. He claims it will cost over £400 to replace. I had absolutely no knowledge of this problem.

We had the vehicle up for sale at £13,995 and we wanted a reasonable quick sale. He offered £12,000 which we accepted. He flew over from Belfast and collected the vehicle which he drove to Liverpool to catch the ferry to Dublin. He signed a receipt which stated: 'It is understood the vehicle is sold as seen, tried and approved by the purchaser without any representations, warranties or conditions express or implied whatsoever'

I am now being asked to make a contribution toward the replacement and he is saying it is under the Sale of Goods Act. Where do I stand Please?