truma ultrastore replacement.

evening,

on my last holiday in sept i had probams again with my gas heating on the truma ultrastore. ive tried everything i can think of now, it is looking like it did before, the circuit board was playing up. this board has lasted me two years, i have tried the board out of my fathers caravan and all works well. now i dont wnt to be spending again on another board, i would prefer to change the whole heater to a more reliable one. has anybody else done this? if so what boiler you purchased? i have been looking at the whale water heater looks very good, any thoughts out there?