BoilerFaultCodesYour boiler is currently operating normally and is simply indicating that it is heating your radiators.
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: HTG mode; the boiler operates in the HTG mode.
What causes this fault?
This code appears when the boiler's internal sensors detect a request for central heating from your thermostat. It indicates that the burner has ignited and the pump is circulating hot water to your radiators. It is a normal status message rather than an actual breakdown or malfunction.
This code is most frequently seen during autumn and winter when homeowners first turn their heating systems back on for the colder months.
DIY fix possible
No action is required as this is a status indicator rather than a fault.Check your thermostat settings if the heating is on when you do not want it to be.Wait for the heating cycle to finish for the code to change.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like 3 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Remeha Quinta 30 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.
Affiliate links — we may earn a commission at no extra cost to you.