Discovering water pooling around your boiler can be concerning and frustrating. While a leaking boiler should never be ignored, understanding the common causes can help you better communicate with your heating engineer and potentially avoid future issues.
Common Causes of Boiler Leaks
High Boiler Pressure
When your boiler's pressure gets too high, water may escape through the pressure relief valve. This is a safety feature, but it needs addressing. You can check this yourself:
Your pressure gauge should show between 1 and 1.5 bar when the system is cold. If it's above 2 bar, you'll need to reduce it. Try bleeding your radiators, starting with the one furthest from your boiler and working your way closer. If the pressure stays high afterwards, ring a Gas Safe engineer.
Temperature and Pressure Relief Valve Issues
The T&P valve keeps your boiler running safely, but it can develop faults. Watch out for:
- Constant dripping
- Crusty white deposits or rust
- A valve that won't reset properly
These issues need professional attention - don't try to fix them yourself.
Loose Connections
Your boiler's parts naturally expand and contract as they heat and cool. Over time, this can make fittings come loose. While you can check pipe joints, pump connections and valve fittings visually, any repairs need a qualified engineer.
Worn Seals and Gaskets
Just like the washers in your taps, boiler seals wear out. The usual trouble spots are:
- Around the pump
- On the heat exchanger
- Near valves
A Gas Safe engineer can quickly spot and replace damaged seals.
Internal Corrosion
Inside your boiler, metal parts can rust, especially if you live in a hard water area. Signs include rusty water leaking from your boiler. Regular servicing helps catch corrosion early.
Heat Exchanger
Problems If your heat exchanger is cracked, you might notice:
- Puddles under the boiler
- Poor heating
- Strange banging or gurgling noises
Unfortunately, a damaged heat exchanger often means considering a new boiler.
Pressure Valve Corrosion
The pressure valve can rust over time. Look for:
- White deposits
- Rust around the valve
- Stiff operation
If you spot these signs, get a professional to take a look.
Prevention Tips
The best way to avoid leaks is through proper maintenance:
- Book annual services with a Gas Safe engineer
- Consider fitting a magnetic filter to catch debris
- Use a quality inhibitor in your system to prevent corrosion
- Keep your eye on the pressure gauge regularly
Never attempt DIY repairs on your boiler - it's illegal unless you're Gas Safe registered. Always call a qualified engineer if you spot any leaks. They'll ensure your boiler is safe and working properly.
Speak with Heating Engineer Acton, Ealing and Hanwell
Simply call us on 07402806032 and we'll be happy to help with any boiler repair services you require.
