Intergas
Chronic Pressure Loss
Boiler loses pressure over time, user must frequently top up system
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Hidden leak in system pipework, Leaking pressure relief valve, Faulty expansion vessel, Micro-leaks at radiator valves
How to Fix / Troubleshooting
Safety first: Do not overfill the system. Repeated topping up introduces oxygen and can cause corrosion.
Steps:
- Inspect PRV discharge: Check the pressure relief valve discharge pipe outside for signs of dripping. If wet, the PRV may be passing and require replacement.
- Check visible joints: Look for damp patches around radiators, valves, and boiler connections.
- Monitor pressure: Note the pressure cold and hot. Large swings may indicate expansion vessel issues.
Hidden leaks in walls or under floors require a heating professional to locate, possibly using leak detection equipment.
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Repair Difficulty
Medium
3/5
Required Part
Pressure relief valve
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