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It's okay have got past the 2 white plugs holding black case , looked at wiring and think it's wrong but don't know how to fix it. Have to connect to ebus as its smart thermostat . Boiler fires up by holding thermostat wires together so have heating but obviously not a solution . Any ideas ?

I've unscrewed 2 screws underneath the boiler that hold black box and it's still held by 2 plastic plugs , how do l get past them ? Many thanks

I have fitted a MiGo thermostat to the old Salus wireless connection and it keeps saying ebus problem , The boiler is glow worm flexicom CX , the wiring goes to a black box inside the boiler before going to the circuit board , is this the problem the wiring needs rewiring into black box If so...