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The thermal fuse was blown out. Unfortunately the thermal fuse is not sold as a single component. One has to replace the whole heat exchanger, which is quite painful. So for future references if someone is experiencing the fault code f.62 or f.25, then unplug the cable that is located on the top...

I have asked an engineer to pay a visit today. He should be able to give an accurate diagnosis and get the problem fixed. I will keep you updated.

Hi guys!! I am currently experiencing a problem with my Vaillant ecotec pro 24 boiler. Last Friday night my boiler broke down. The fault code f.62 appeared which stands for according to the Vaillant manual "Gas valve shutoff delay" and the cause for it is "Gas valve leaking, electronics...