BoilerFaultCodesYour boiler is working correctly but is currently sitting idle because your thermostat or programmer hasn't told it to turn on.
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: Standby: there is no heat demand from control system.
What causes this fault?
This code appears when the boiler is powered on and ready to work, but is waiting for a signal from your heating controls to begin firing. The most common reasons for this are that your thermostat is set lower than the current room temperature, the programmer is set to 'off' or 'timed', or the batteries in your thermostat have run out. It essentially means the boiler is 'listening' for an instruction that hasn't been sent yet.
This is very common during the transition from autumn to winter when homeowners first try to turn their heating back on, only to find their thermostat batteries have died over the summer.
DIY fix possible
Check that your room thermostat is turned up higher than the current room temperature.Ensure your central heating programmer or timer is set to 'On' or 'Auto'.Check that the batteries in your wireless thermostat are not dead.
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 0 — 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.