Hello, Thanks for your answer. I checked every connection but there wasn't any oxidation anywhere. I also checked the programming and E5 was already set at 0. I didn't try to keep the connector removed because I had a professional come at my house today for the annual checkup of the machine so I thought I would ask him. He told me that the TADO wireless V3 thermostat isn't compatible with my machine (which has an exterior temp sensor and heat regulation) and that is the reason of the error. Whenever the TADO thermostat requires heat, the machine does nothing, but when I turn the wheel (to set confort temperature) the boiler starts right away. So as for now I'm not quite sure what to do, as I already invested quite some money in my TADO setup.
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