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winty85
Hi im a pro gas installer and not long ago fitted a duo tec 28he for a customer. It worked fine for 2 months then started to sometimes say E133 I have fixed boilers with this problem before (gas supply, flue damage or blocked condence) but these were not the problem. Heat team came out and played with the boiler. He said that the gas valve was wrongly set up and that I sould have adjusted it as the installer. But I was under the impression that the gas valves were factory set and that only heat team could adjust it. Also it was gas rated on instalation and was bang on. Any input? Also he changed the PCB?!?