Legal question about my house!?

I am in the UK and bought a house off-plan 8 months ago. Shortly after we moved in, the home builder went into administration and not long after that, a new buyer for the company was found and all seemed well. However, last night, our boiler blew up. The house (and boiler) is less than 6 months old but we were not concerned as we knew we have a 2 year warranty on the house, for issues like this. Howevver, when we contacted the new owners today, to find out how to get the boiler repaired, they dropped a bombshell.....they had bought the ets of the company we'd bought the house from, but the warranty was no longer valid. In other words, we were on our own and now responsible for the boiler. Something about this just doesn;t feel right to me....we have today consulted our solicitor, but they have said it will take a couple of days to find out where we stand. Surely we have some rights in all of this? Does anyone know where to go next? We are not happy at the thought of putting a new boiler into a 6 month old property!