What the manual says
Manufacturer manualStandby mode.
From this model's manual
Verified against the Atag Q 30cr installation & service manual.
DIY fix possible
Check your room thermostat is set to a higher temperature than the current room temperatureEnsure your heating timer or programmer is set to 'On'Turn on a hot water tap to see if the boiler fires up
Find a Gas Safe engineer
Search the official register →
Boiler cover options
Avoid the next call-out bill
A cover plan would handle faults like StBY: no call-out fees, no surprise bills.
Approved partner
Get a quote →
Domestic Appliance Guard
Unlimited call-outs, 24/7 helpline, no price-hike promise
Affiliate links. We may earn a commission at no extra cost to you.