Hi this is due to a faulty safety sensor called a thermocpouple
did you want to replace this your self? or will you have an RV tech do this for you?
I would like to try and replace the thermocouple myself but am not sure if this can be done without disconnecting all the pipelines and electric cables from the boiler and possibly having to remove the whole boiler from the compartment under the motorhome sink. There is not much room in this compartment to wield tools etc.
Yes please - I need a source for the Truma thermocouple.