I have had my van a couple of years now and when I first got it I didn't really get to grips with how this propex heater works so I have just managed with the gas /electric truma ..... However I am now determined to get the damn thing working. I have sussed out all the instructions and am now just getting two flashes on the indicator which apparently is to do with not getting enough gas. Looking from above the propex unit the gas pipe leaves the box and then seems to connect,via a tee junction, to the hot water tank so is this normal and do I have to have the hot water working at the same time. Any advice please would be appreciated