Once had a caravan with the Alde heating and it never faulted, however we bought a motor-home with the Alde and had several problems, luckily covered by warranty. We were troubled to find that Alde no longer offer support for the 3000 system, no advice, help or spares!!! Thankfully they did offer a contact number for an ex employee of theirs who still does offer backup, Graham Cuttmore in Northampton who is available on 07702 057627. I found him very helpful. If you have any problems I can recommend him.