I think what I have done is flick all switches on then
pumped the water through thus the heater has gone on and the thermal cut out has activated to stop the element from burning out.
there is 2 separate fused switches at the side of the rcd board I think I have to let the water come through before I switch one of these on
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets