A leaking boiler is never something to ignore. Even small drips can be a sign that something is wrong with your heating system, and if left untreated, it can lead to bigger issues, higher repair costs and potential safety risks. Whether the water is pooling beneath the unit or you’ve noticed damp patches on nearby walls, identifying the cause early is key.
Common Causes of Boiler Leaks
Pressure Problems
One of the most frequent reasons for a leaking boiler is a problem with internal pressure. If the pressure is too high, your system may release water through a pressure relief valve to prevent damage. Alternatively, low pressure combined with a leak may point to a fault in the expansion vessel or a crack in one of the internal components.
Corroded Components
Corroded pipework or fittings can also lead to small, persistent leaks. Over time, this corrosion weakens the metal, allowing water to escape from joints or seals. In some cases, leaks may come from the heat exchanger, a crucial part of the boiler that’s expensive to replace.
Faulty Installation or Poor Servicing
Faulty installation or poor servicing in the past may also be to blame. If seals were not properly fitted or valves have loosened over time, small leaks can start to appear. Similarly, if your boiler is older, general wear and tear can affect its integrity, especially if regular servicing has been missed.
What to Do If Your Boiler Is Leaking
If you notice a leak, the first step is to turn off the boiler and isolate the water supply to prevent further damage. Avoid trying to fix the issue yourself, as this can be dangerous and may void any existing warranty. Instead, contact a qualified Gas Safe engineer to diagnose the issue properly.
A professional inspection will determine whether the leak can be repaired with a replacement part or if a new boiler is the more cost-effective option. Acting quickly not only helps prevent further damage to your heating system, but also protects your home from water-related issues like mould, damp and electrical hazards.
Speak to Us About Boiler Repairs
At Aquatech Heating & Plumbing, we provide reliable boiler repair services across Kent, Gillingham, Maidstone, Sittingbourne and Tunbridge Wells. If your boiler is leaking or showing signs of trouble, our Gas Safe registered engineers are ready to help with fast, professional support.
Call us on 01634 310689 to book a boiler check and get expert advice on keeping your heating system safe, efficient and leak-free.
