The heater is fitted as standard to the caravan and is one of the Truma blown-air types. I had my original facts slightly wrong as aparently, what I've just found out is that the heater manufacturer fits a 13A fuse. The caravan manufacturer then replaces the 13A fuse with a 5A when it is...
I've just had a problem with a 240v electric heater in my caravan whichs trips the electric when left on for long period of time. The problem was with a faulty fused mains switch that contained a 5A fuse. As the heater is a 2000W heater I would have expected to have a 13A fuse in it not a 5A...