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Boiler losing pressure

Posted by Ros Aveling, on
What needs to be fixed when a gas boiler starts losing pressure and leaking?
Anthony Curren

Anthony Curren

The usual cause of pressure loss is a leak on a radiator this may not leave a pool of water as it evaporates wrapping paper towel around joints may show leak. Also if gauge goes above 3 bar the pressure may be lost this could be the expansion vessel or pressure relief valve if this is the case water will be seen outside near the boiler ( a short copper pipe that points back towards the wall ). If the pressure drops whilst using hot water this can indicate that the heat exchanger is faulty.

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