Hi again all, have at last joined the site! I have a slight problem and could do with some pointing in the right direction. I have a '91 Rockwood, 1 previous owner and well looked after but obviously some of the components will be ageing. I keep her well charged up and use it as a weekend home as I have her at a friends farm. The other day the furnace failed to respond in any way to the thermostat and I also noticed a change in tone coming from the transformer/main electrics cabinet. I cannot see anything amiss, not that you necessarily would with electrics, but I have a gut feeling its something to do with the switch/power supply. I have stripped down and fixed furnaces before but am totally hopeless when it comes to electrics. Any suggestions? And, many thanks in advance.