Video courtesy of Youtube and credit to the author: Larcs Workshop

So we noticed that the expansion bottle level switch was leaking when we did the service. I took it out and this is what we found .

Level sensor (with ‘O’ ring):-
https://www.brickwerks.co.uk/t3-parts…

Level sensor ‘O’ ring only:-
https://www.brickwerks.co.uk/t3-parts…

2020-07-04