S.17 Low
Your boiler is busy cooling itself down after providing hot water, but the water isn't moving through the system as quickly as it should.
Technical description: DHW mode – pump overrun error
Typical repair cost: £0-120 (including labour)
DIY fix possible
Check that at least two radiator valves are fully open to allow water flowEnsure your boiler pressure is between 1.0 and 1.5 bar on the displayRestart the boiler to see if the status code clears
Protect yourself from future repair bills
A boiler cover plan would cover faults like S.17 — no call-out fees, no surprises.
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Parts commonly replaced
- None (Adjustment only)
- Circulation Pump
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