We have found that our heater doesn't seem to work as well heating the van if we use it just on 240volt. Although it seems to warm up the output from the fan isn't that good :Sad: is this normal or should the fan operate the same as on gas? Another problem we have had is the inlet pipe freezing even with the heater on. On the boiler water inlet pipe before the dump valve there is a join in the pipe with what looks like a non return fitting, this must also reduce the diameter of the pipe. Where this joint is there is a drop out hole with wires going through to the outside. When the heater is on the gas you can feel cold air being drawn into the van over the pipe. On one occasion at least it caused the pipe to freeze up, the first we knew was no hot water coming out & we couldn't hear the pump. It took a long while to find out where it was frozen as it is difficult to access & defrost. I have put a temperature sensor on the pipe to monitor it & as a temporary measure I have managed to re-direct some of the heat towards the pipe. We have been having temperatures down to -8C here in France & probably lower. We were going to go through Andorra but we aren't sure we should chance it.