Low
COdE on Atag Q 30CR

Your boiler is asking for a security or installer code instead of displaying a fault, meaning you have accidentally entered the configuration menu.

Monitor it

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.

What the manual says

Manufacturer manual

Request to enter the access code

From this model's manual
Verified against the Atag Q 30cr installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Press the 'Reset' or 'Back' button on the control panel to exit the menuWait 5 minutes for the display to time out and return to the home screenSwitch the boiler off at the fused spur for 30 seconds and turn it back on

Find a Gas Safe engineer
Search the official register →

Avoid the next call-out bill

A cover plan would handle faults like COdE: no call-out fees, no surprise bills.

Approved partner
Domestic Appliance Guard
Unlimited call-outs, 24/7 helpline, no price-hike promise
Get a quote →

Affiliate links. We may earn a commission at no extra cost to you.

Related guides you might find useful