201 O Low
Your boiler is simply letting you know that it is currently busy heating up the water for your taps or shower.
Technical description: Boiler in hot water mode
Typical repair cost: £0 (including labour)
DIY fix possible
This fault may be fixable without an engineer. Check your manual first.
Protect yourself from future repair bills
A boiler cover plan would cover faults like 201 O — no call-out fees, no surprises.
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