No code on the display?
Plenty of faults never show a code. Start from what the appliance is doing and work backwards.
Boiler keeps losing pressure
A sealed heating system does not use water, so a gauge that keeps falling means water is escaping somewhere. Here is how to work out where.Boiler making a banging or kettling noise
A boiler that bangs, rumbles or sounds like a kettle boiling is telling you that water is not moving through it properly. It is worth acting on rather than living with.Dishes coming out dirty, gritty or cloudy
Three quite different problems get described the same way. Working out which one you have takes one look at a glass and saves you buying the wrong thing.Dishwasher leaking onto the kitchen floor
The one dishwasher problem worth stopping for immediately. Turn the water off first, then work out where it is coming from — the answer is often not where the puddle is.Dishwasher left with water in the bottom
Standing water in the base of the tub is the most common dishwasher complaint there is, and the cause is usually reachable with your hands in about fifteen minutes.No heating and no hot water at all
Before assuming the boiler has failed, there are four things worth checking that account for a large share of these call-outs and cost nothing to rule out.No hot water but the heating still works
When heating works and hot water does not, the fault is almost always in the part of the boiler that switches between the two rather than in the boiler itself.