BoilerFaultCodesWhat the manual says
Manufacturer manualFan and water pump return water
What causes this fault?
This status occurs when the boiler has successfully met the heating demand and is simply finishing its operation. The internal fan and pump continue to run for a short period to move residual heat away from the heat exchanger and prevent the system from overheating. It is a normal part of the boiler's cooling process rather than an actual breakdown.
DIY fix possible
Wait for 5-10 minutes as this is often a normal part of the boiler's operationCheck that your room thermostat is not set lower than the current room temperatureEnsure all radiator valves are open to allow heat to dissipate
Avoid the next call-out bill
A cover plan would handle faults like S.5: no call-out fees, no surprise bills.
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Related fault codes
All 71 fault codes on the ecoTEC exclusive
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