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The boiler is firing up fine, and the code on the outside is definitely overheat. A heating engineer yesterday looked at it, and his infrared camera showed the combustion chamber door seal was faulty. Fortunately I have already bought the part ahead of their visit, so they replaced it. They then...

*** disclaimer - I'm not doing any work on my boiler myself, I have gas safe heating engineers doing it *** Hello Forum, I'm having problems with my Potterton boiler. A heating engineer replaced the CH/HW motor on our simple CH+HW system, but afterwards the 3-way valve started making a lot of...