The problem of boiler pressure dropping is common, especially during winter months. Users often try to fix it by simply adding water. However, if your boiler's water pressure (bar) drops constantly, it is a sign of a serious plumbing or boiler malfunction.
Why Does Boiler Water Pressure Drop?
Ideal boiler pressure is usually between 1.5 and 2.0 bar. If the pressure frequently drops below 1.0 bar, the main reasons are:
- Hidden Water Leak in the Piping: An invisible small leak in your home's heating pipes will cause the pressure to drop daily or weekly.
- Expansion Tank Failure: If the expansion tank inside the boiler has lost its air charge or its membrane is punctured, pressure fluctuations and drops will occur.
- Pressure Relief Valve Leak: When the safety valve that balances the pressure malfunctions, it releases water, causing the pressure to drop.
- Heat Exchanger Crack: Hairline cracks in your boiler's main heat exchanger can cause water loss.
What Should You Do?
Constantly topping up the boiler with water is a temporary solution. Moreover, constantly adding fresh (oxygenated and calcified) water into the system causes radiators and boiler parts to corrode faster.
Solution: If a boiler service technician couldn't find a fault in the device (expansion tank, valve, etc.), your problem is 99% a hidden water leak in the plumbing. As Göksu Plumbing, we use special Thermal Cameras and moisture meters to pinpoint this leak without breaking any part of your home.
If your boiler pressure is dropping and you see dampness or bubbling walls somewhere in your home, get professional help without wasting time. For non-destructive water leak detection, Call Us Now!