I have a Europa (Ideal Caradon) Combi wall-hung gas boiler. Perhaps a couple
of months ago I noticed that the DHW flow to the kitchen tap (nearest to
boiler) was getting low (approx half normal flow). As the DHW taps to
shower/ bathroom were still working normally I checked the tap for a
blockage, and considered replacing the pipework to the tap from where it
tees off from the HW feed to the bathroom. But then I noticed a problem with
the boiler - the thermostat settings are no longer graduated - i.e. the
setting is either warm (minimum?) or very hot (maximum) with no in between
on the dial ('very hot' kicks in around halfway on the dial). When on a warm
setting the pressure stays relatively low - from 1.5bar cold to perhaps
2.5bar when in use - and relights in the morning when off overnight. But
when the system is on a 'very hot' setting the pressure goes right up to
nearly 4bar when in use, but overnight the pressure goes back down below
1bar so the boiler doesn't ignite in the morning.
Any thoughts before I start delving...?
- posted 13 years ago