Vokera Chronic System Pressure Loss

Furnace frequently loses pressure and needs topping up

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.

Possible Causes

Leak in heating circuit, Faulty expansion vessel, Dripping pressure relief valve, Micro-leaks in radiators

Safety: Do not overfill the system. Repeated topping up can introduce corrosion.

Inspect for visible leaks: Check all radiators, valves, and joints for damp patches or staining.
Check pressure relief discharge: Look at the outside PRV discharge pipe for signs of water staining or dripping.
Monitor pressure: Note how quickly pressure drops (hours, days, weeks) and report this to a technician.
Professional leak detection: A heating engineer may need to pressure-test the system and check the expansion vessel charge.

Hard 4/5

Expansion Vessel or Pressure Relief Valve

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