Hi. I have an Heater model Junkers WR11 atmospheric (same link model), installed 2 and a half years ago. He passed the mandatory review without any problem in July 2018. It is in a laundry room always open to the outside by a louvered blind and insulated with kitchen door. The heater works perfectly and never goes out (not even with wind) despite being of natural draft, but I have found that there is a kind of bubble in the piece of smoke outlet pipe that was installed. I put the photos. I called the gas company that installed it and they tell me that the technician has to check the heater because it may have a problem. I wanted to know your opinion about what this may be due to, if there is any danger and if it would be enough to change that piece of tube or if the whole heater would most likely have to be changed. I am fearing since they tell me that the heater is not worth it and that one must put a new one of those expensive, with the complete installation and others. And this heater is just over two years old, it works without problem and the temperature regulation is perfect. I do not know if it can be a problem of corrosion of the tube due to condensation or something of that type. I would like people who understand the subject to give me their opinion to know how to deal a little with the technician they send me.

Hi RACONTERO: We must disassemble and see what happened to it, there can be several problems, one corroding, the other over temperature and this may be due to a defect of the tirage, and the last one that occurs to me that the paint does not bank the temperature, although it is The least likely. LUCK