Ravenheat
Chronic Pressure Loss / Leak
Furnace frequently loses system pressure, requiring regular topping up.
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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
Leaking radiator or pipework, Faulty pressure relief valve discharging, Internal leak in heat exchanger, Failed expansion vessel
How to Fix / Troubleshooting
Safety: Do not repeatedly over-pressurise the system. Excessive pressure can cause leaks or component failure.
User checks:
- Inspect visible radiators and valves for signs of water staining.
- Check the pressure relief valve discharge pipe outside for dripping water.
Technician checks:
- Test and recharge or replace the expansion vessel.
- Check the pressure relief valve for debris and reseating; replace if passing.
- Pressure-test the system to locate hidden leaks.
- Inspect the primary heat exchanger for internal leaks.
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Repair Difficulty
Hard
4/5
Required Part
Expansion Vessel
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