Low
Pump overrun on Ideal British Gas RD

Your boiler is currently running its internal pump to safely move leftover heat after the burner has turned off, which is a normal protective process.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

LED 3 on, LED 4 off

From this model's manual
Verified against the Ideal British Gas Rd installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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