I’ve got a truma combi 4 (403) in my pilote Mooveo, it’s stopped working no lights no nothing. Last working before the wet winter break. Q is, do I send it for repair (as well as whatever fault I’ve broken a power pin on the PCB) or do I upgrade it to a more modern truma unit, we love the MH and she will be with us for the next decade we hope. Does anyone have any experience swapping the combi heaters out for a newer model or a replacement ? Dan