After having problems with our heating and thermostat at home last November, Mr Corrigan changed the heat exchanger in the boiler. Since Liam carried out these works we have not experienced any issues with the previous problem and our heating is now working fully without any problems. Liam was very polite and reliable which was highlighted by the fact that he bled all of our radiators at no extra cost. Moreover, he was extremely professional and clean (he supplied his own vacuum and hovered any slight dust that occurred during his work). I have recommended Liam to several family members, and would encourage anyone with heating/boiler issues to employ him.