Domestic

Boiler repair & maintenance

Fault-finding and repair on gas boilers — no heating, no hot water, pressure loss, lockouts and error codes.

A boiler that has stopped may need one part replaced, or it may have reached the point where a repair no longer makes sense. We fault-find and repair domestic gas boilers across Nottingham and the surrounding area, and we tell you plainly which of the two it is. Gas Safe registered, with rates agreed before we start.

What the common symptoms mean

Heating but no hot water, or hot water but no heating, often points at a diverter valve or a pump rather than the boiler as a whole. Radiators cold at the top or cold at the bottom are a system problem instead, though they show up as poor heating and get blamed on the boiler. It is worth knowing which of the two you have before anything is replaced.

Pressure that keeps dropping means water is leaving the system somewhere. A weeping joint, a failed expansion vessel or a pressure relief valve discharging outside will all do it, and topping the system up every week only postpones finding the cause.

A lockout or a fault code on the display is the boiler protecting itself. Resetting it once is reasonable. Resetting it repeatedly is not, because whatever triggered it is still there. Banging or kettling, that sound like a kettle coming to the boil, usually means scale or sludge sitting where the water is hottest.

How we find the fault

We start with what you have noticed. When it happens, whether it affects heating or hot water or both, what the display says, what the pressure gauge reads when the system is cold. That narrows things down before anything comes apart.

Then the checks on the appliance itself: gas supply and working pressure, electrical controls, sensors, the fan and flue, the condensate, and combustion readings taken with an analyser where the fault calls for it. Part of the job is separating a boiler fault from a system or control fault, because a failed thermostat, a wiring centre or a seized valve will stop a perfectly sound boiler from firing.

Common failure parts we carry with us. Others have to be ordered, and how long that takes depends on the supplier and on how common the appliance is. You will be told what the part is, whether it is still available, and what the options are before anything is ordered.

When replacement makes more sense

Three things usually decide it: the age of the boiler, whether parts are still supported, and how many times the same appliance has already failed. Once a manufacturer stops making a part, a repair that was straightforward last year becomes a hunt, and the next failure may not be fixable at all.

We will price the repair and say honestly if we think the money is better spent on a replacement. Where the appliance is sound and the repair is worth doing, we say so and repair it. Where an appliance is genuinely unsafe, Gas Safe procedure applies: it is turned off and labelled, with your permission, and you are told exactly what was found and why.

Common questions

My boiler has locked out. Can I just reset it?

Resetting once is reasonable, because a lockout is the boiler shutting itself down rather than running with something wrong. If it locks out again soon after, stop resetting it and have it looked at. Repeated resets hide the fault and can turn a small failure into a bigger one. Note the code shown on the display before you clear it, as that narrows down where to look.

Will you be able to fix it on the first visit?

It depends on what has failed and whether the part is available. Once we have found the fault we tell you whether it can be fitted straight away or has to be ordered. Where the part is less common, or the appliance older, it comes back on a second visit. We work Monday to Friday, 8am to 6pm.

Is it worth repairing, or should I replace the boiler?

It depends on the age of the appliance, what has actually failed, whether parts are still readily available, and how many times it has gone wrong already. A single sensor failing on an otherwise sound boiler is worth putting right. An appliance that keeps failing in different places, and whose parts are getting scarce, is usually money spent twice. We will quote the repair and say honestly which of those we think it is, and the decision stays with you.

Why does my boiler keep losing pressure?

Because water is leaving the system somewhere. The usual causes are a weeping joint or radiator valve, a failed expansion vessel, or a pressure relief valve passing water out through the discharge pipe outside. Topping it up each week is managing the symptom rather than fixing it, and running the system low does the boiler no favours. The work is to find where the water is going and stop it.