Ideal Low System Water Content / Flow Issue

Ideal boiler displays C7 and may not fire

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

Air lock in system, Closed isolation valves, Blocked system filter, Pump not circulating

Safety first: Allow system to cool before opening bleed valves or touching pipework.

User checks:

Check pressure: Ensure system pressure is around 1.0–1.2 bar when cold; top up if low.
Open valves: Confirm all radiator and boiler isolation valves are open.
Bleed radiators: Remove trapped air and re-pressurise.

If C7 remains, a heating engineer should check pump operation and system flow.

Medium 3/5

Central Heating Circulation Pump

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