S.58 Low
Your boiler is temporarily reducing its power because outside wind or atmospheric conditions are affecting the burner flame.
Technical description: Modulation limitation due to noise / wind error
Typical repair cost: £0-120 (including labour)
DIY fix possible
Check if the outside flue terminal is obstructed by garden debris or snowWait for high winds to subside to see if the status clears automaticallyReset the boiler if the status persists once weather conditions are calm
Protect yourself from future repair bills
A boiler cover plan would cover faults like S.58 — no call-out fees, no surprises.
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Parts commonly replaced
- None (often self-correcting)
- Flue seals
- Gas valve
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