Whether your boiler is leaking water or gas, you need to take action – and fast.
Here’s what could be causing your boiler leak, and how you might be able to fix it.
02 Oct 2020 | Help me with maintenance & repair
Boilers shouldn’t leak any water but should you find your boiler leaking, here’s what could be causing it:
All of these faults are typically repairable. But in some instances, you may need a new boiler.
The first sign of a leaking boiler might be that it cuts out due to low pressure. And even after you top it up, it loses pressure again quickly. If that happens there are a couple of things you can do:
Here are few things you can do when your boiler is leaking:
It’s usually best to leave boiler repairs to the experts. But if you’re competent at DIY you may be able to do a basic repair.
It's best to have your boiler regularly serviced. That way a professional engineer can pick up any potential problems and make sure your boiler's in top condition. Aim to service it once a year.
It's also worth looking at boiler cover as many insurance providers, including our partner Domestic and General, throw in boiler inspection and servicing.
If your boiler's leaking gas, you may be able to smell it. Other signs of a leak include black stains above or near the boiler. There may be excess condensation on your windows. Or the pilot light – the flame that indicates your boiler’s working – might be burning orange or yellow (rather than blue).
Boilers should never leak gas or oil. For safety, modern boilers burn gas or oil in a sealed combustion chamber. They bring in the oxygen needed to make the fuel burn and then release the exhaust fumes safely back outside. This sealed system keeps poisonous gases out of your home. But, very occasionally, things can go wrong.
If you suspect your boiler is leaking gas, immediately open all windows and doors and extinguish any naked flames – including cigarettes – then call the Gas Emergency Services free on 0800 111 999.
A boiler gas leak is very dangerous, especially as fumes from gases like carbon monoxide can be odourless. It’s why you should install a carbon monoxide detector in your home. Here are some symptoms to be aware of:
If you suspect a leak and you’re feeling unwell, get into fresh air and seek immediate medical advice.
If you use heating oil and spot oil stains or pooling, it could be a sign that your boiler is leaking. The smell of oil might also be stronger than normal.
Close the tap or valve on the oil tank, and open the windows to prevent fumes from building up. If it’s safe to do so, try to collect any leaking oil in a tub, or contain it by putting down sand or earth. Don’t wash it away!
Get help by calling out a heating engineer or your home insurer’s emergency number. And if anyone feels sick or dizzy, leave the house immediately.