Baxi Solo WM40/4RS

[ludwig23]

Hello everyone,
Please could anyone tell me if the Baxi Solo WM40/4RS is obsolete or are the plumbers that come around on our service plan just after another job?

 

[cross thread]

spares available even though it almost 20 years old

 

[ludwig23]

The plumber says the boiler is kettling and really needs replacing although I have read that a system flush will clear the limescale. Since they came out yesterday and adjusted the pump a small weep is showing in the ceiling. If I was to use Fernox f4 Express to try to seal the system would it affect the flushing of the system.
Should I flush first or seal the system!!!!