Hello, I have a Junkers boiler that has been running flawlessly since 1999. I have never had a maintenance performed on it. The chimney sweep does an exhaust gas measurement every year. I know the Junkers service technician very well and he told me that the annual inspections of the heating systems are pure money-making schemes. The boilers are built with safety in mind so that at the slightest fault the devices shut down and an error code is displayed. If the chimney sweep says the values are not okay, then you just get the technician. But everyone has to decide that for themselves. Of course, I am only talking about natural gas heating now. With liquefied gas or oil it can look quite different.
Regards Thommi
Hello Thommi!! Unfortunately, I cannot really follow you and your friend's reasoning, but please. You claim that the chimney sweep performs an exhaust gas measurement every year anyway, and I believe you, but doesn't the chimney sweep charge for this? Don't think this is for free, so you do pay for it, and I find that again to be that money-making scheme. I would argue that if I have a service done by a professional every year, I will certainly get a report about the exhaust gases, and the best part of this story is that he really knows his stuff, also about this device, which I would not say about the chimney sweep. So I would say you should reconsider everything you wrote because a boiler is not a toy. And one more thing about your boiler: do you know that the combustion chamber seals, sparks, etc. wear out or get dirty? If that is the case, you can be sure that the boiler won't run efficiently anymore. So no offense, just my opinion. Best regards.