water pump not working while is on main power

failmow
failmow Forum Participant Posts: 1
edited October 2020 in Caravans #1

i'm new with caravans. i have an issue with water pump (does work when is on 12v new leisure battery ) but whenever i switch for main power (there is a panel under bed where has 12v / switch 230w and can only work on one at the time ) the pump not working, So it should work as long as i have to use hot water or have the fridge on if i'm camping. It shouldn't be like every time flip the bed and switch every time... also the fridge on 12v whenever i tow the car not sending any power to but i mention i have checked all fuses , fridge working. Please help.