Thanks for the replies.
At the moment its working fine, who knows, so I will just have to wait till an engineer can get out.
I know all about Isars lousy reputation, recently had to replace the old PCB for the new orange one which should hopefully *cough continue to work.
Hello. forgive me if the following is poorly explained I’m new to the world of combi boilers.
I have an ISAR HE35 condensing combination boiler. Today I had problem with the RCD tripping as soon as the thermostat was turned up. Using hot water there was no problem, it was just for the...