Hi Acp, many thanks for the response. it is the RCD tripping, the whole house light. I am not sure what do you mean by overload breaker? we had to reset the RCD every time it tripped. I took the heater out and did a continuity test, it was ok. The machine starts to fill with water, but cuts of very shortly. I have also cleaned the water container that contains salt. the salt side of the compartment was quite brown, so i took it out and rinsed it. The only thing is it was not used for few years. What is the best way to test the heater before i change it? thanks
monty
August 2017