Innovations in Boilers and the Future of Home Heating
Boiler Installation
Heat pumps, hydrogen ready boilers and hybrid systems now shape the future of home heating, with grants available to help cover the cost of switching.
Most boilers develop the same handful of faults, and the good news is that almost every one is easy to explain once you know what to look for. Whether your radiators aren’t heating evenly, there’s no hot water or heating at all, or your boiler’s pilot light has gone out, these issues follow familiar patterns that our engineers see week in and week out.
This guide walks through the most common boiler problems homeowners across Dorset and Hampshire run into, what usually causes each one, and some straightforward boiler troubleshooting to try before calling an engineer. We’ll start with one of the most worrying, and that’s losing heat and hot water altogether.
A boiler with no hot water or heating is one of the most common boiler problems we get called out for, and it’s rarely as serious as it feels. In most cases, the fault sits with one part rather than the boiler as a whole.
Before calling anyone, it’s worth checking a few things first:
If none of these solve it, and heat is reaching some radiators but not others, that’s a different fault worth understanding.
Radiators not heating up evenly is another one of the common boiler problems that looks worse than it is. Usually, it happens when air becomes trapped inside the radiator, which stops hot water circulating properly and leaves cold patches, most often at the top.
Bleeding the radiator releases that trapped air and lets water flow through the full length of it again, and it’s a job most people can do safely themselves with a radiator key. We’ve put together a straightforward guide on how to bleed your radiator in ten steps if you’d like to try it before booking anyone out.
If bleeding doesn’t fix it, or the same radiator keeps needing it repeatedly, that often points to sludge building up in the system. It’s also worth keeping an eye on the boiler itself during this time, since the same pressure issues can cause it to switch off unexpectedly.
A leaking boiler is understandably one of the more common boiler problems that causes concern, but most leaks come from a handful of well understood causes rather than a serious fault. A worn pressure valve, a corroded joint, or a failing seal are the usual suspects, and our guide on 5 reasons why your boiler is leaking covers each in more detail.
One of the clearest signs something’s wrong is a pressure gauge that keeps dropping, since a boiler losing water will also lose pressure over time. If you’re looking for low boiler pressure solutions, the first step is topping the system up using the filling loop, following your manual carefully. If pressure drops again within a day or two, there’s a leak somewhere that topping up alone won’t fix.
Left unresolved, a leak can also cause the boiler to cut out as a safety measure, the next problem worth understanding.
A boiler that keeps turning off unexpectedly is often doing exactly what it’s designed to do: protecting itself when something isn’t right. Low pressure, a faulty thermostat, or trapped air can all trigger this kind of shutdown, usually alongside a fault code on the display that points towards the cause.
If you’ve ruled out low pressure and the boiler still cuts out, check whether radiators not heating up correctly are part of the same pattern, since an unbalanced system can put uneven strain on the boiler as it compensates. A thermostat that’s drifted out of calibration is another common trigger, switching the boiler off before rooms have reached temperature.
Repeated shutdowns shouldn’t be ignored, since they often become more frequent rather than resolving on their own. In some cases, the same ignition fault is also what causes the pilot light to go out.
A boiler pilot light out is one of the more visible faults, since you can usually see straight away that the small flame isn’t lit. In most cases, this comes down to a draught blowing it out, a faulty thermocouple that fails to detect the flame, or dirt building up in the pilot assembly.
Many boilers have a simple relighting procedure printed on a sticker inside the casing, and it’s usually safe to follow this yourself if you feel comfortable doing so. If the pilot light won’t stay lit even after relighting it correctly, that’s usually a sign the thermocouple or gas valve needs replacing rather than something a second attempt will fix.
It’s also worth mentioning that if you’ve been wondering, ‘why is my boiler leaking around the same time the pilot light keeps going out?’, the two can be connected, since water reaching the pilot assembly will often extinguish it.
Working through common boiler problems one by one is useful, but some general boiler troubleshooting can save you a call-out if the fix is simple. Before booking an engineer, run through a few basic checks:
If you’ve run through these checks and the problem remains, or you’re not confident working on gas appliances, that’s the point to bring in a qualified engineer.
Knowing when to call a gas engineer usually comes down to one simple test: if the problem keeps coming back, or it involves gas, pressure, or anything you’re not fully confident handling, it’s time to get it looked at properly.
Our Gas Safe registered engineers cover Dorset and Hampshire and can usually get to you quickly for an accurate diagnosis. Call us on 01202 355 344 or fill in our contact form, and we’ll sort out exactly what’s going on with your boiler.
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