BoilerFaultCodesYour boiler is simply notifying you that it is currently busy heating up your tap water.
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.
Technical description: Burner on - in domestic hot water mode
What causes this fault?
This is not a fault, but a status update showing that your boiler is currently working to provide hot water to your taps or shower. It occurs because the internal sensors have detected a demand for hot water and have successfully ignited the burner to meet that need. Once you turn off your tap, the code will change as the boiler moves into standby or central heating mode.
DIY fix possible
This fault may be fixable without an engineer. Check your manual first.
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A boiler cover plan would cover faults like 5 — no call-out fees, no surprises.
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Potterton Envoy Plus is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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