Thanks for the replies. I thought it shouldn't lose the water, had it warming up stood for awhile and didn't notice any leaks, kicks off first time and runs nice. I will do some more checks tonight.
As for the fan, when it stops, it stops completely. I'm guessing these use a thermostat?
I noticed this morning a small single core white wire hanging not connected to the fuse box, could this be part if the old lighting?
Thanks again,
Hal.