One was a Valiant 242 vcw that has a faulty dhw, then pcb board went and heat exchanger was leaking
the other was a glowworm, 30 main heat exchanger fault, pump noisey, pressure valve leaking + leaking vessel of some sort.
the current one thats having trouble is - worcster combi 28si2
PCB is dead = no hot water.
The valiant is / was atleast 13 years old
the glow worm is / was 7 years old
the WC is 4 years old.
Yes the same people are fitting / repairing the boilers.
the biggest issues is, i have used several diffrent compaines before,
I cant find a decent one, so i stick to using local corgi eng's. atleast they turn up.
I have even resorted to putting up an add on these forums, - no answer.
I just want a good corgi, who can fix diagnose faults.
in excess i have spent nearly 2600£ in parts and labour including two new boilers.