It could only happen to us Boiler has shut down E110 I think

[McCabe-Thiele (Ted)]

Central heating stopped working again - boiler does not fire up.
Engineer booked for the 15th April 2024 - I looked at the motorised valve indicator that was not aligned with the H position so using a lump of metal I tapped the main body of the 3 way valve.
The valve position slowly moved to H so the heat is working for now.
The external valve motor unit was replaced a couple of years ago by the Baxi engineer.