As above, whats the worse part/boiler you've had to work on and why? (no detail into gas safety as it's in the wrong forum!)
personally for me, after today i'm voting Worcester CDI expansion vessel. Wasn't much left in it once I got the old one out, fan, heat ex, plate hex, pump, APS etc all removed.... nightmare! Normally fit an external in, but couldn't on this one.
personally for me, after today i'm voting Worcester CDI expansion vessel. Wasn't much left in it once I got the old one out, fan, heat ex, plate hex, pump, APS etc all removed.... nightmare! Normally fit an external in, but couldn't on this one.