What does the Unical 23 fault code mean?

Your boiler has detected that a control button has been stuck or held down for too long, which usually happens if a button is physically jammed.

How much does it cost to fix Unical error code 23?

Typical repair cost for the Unical 23 fault is £150-300 including labour.

Unical 23 Fault Code: What It Means & How to Fix It

What the manual says

Manufacturer manual

Detected tab panel button pressed for longer than 30 “. Check keypad and reset the status of the buttons. Or replace the electronic board

From this model's manual

Verified against the Unical/Unical Alkon C 28 He installation & service manual.

DIY fix possible

Locate the control panel on the front of your boiler.Firmly press and release each button several times to ensure none are physically stuck or jammed in the depressed position.Switch the boiler off at the fused spur or mains supply, wait for 30 seconds, and turn it back on to reset the system.

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 23: 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.

All 33 fault codes on the Alkon C 28 HE

Seeing a different code? Every code this model can display, in one place.

1 4 5 6 8 09 11 12 13 14 15 16 17 18 20 21 22 24 26 27 30 32 33 38 43 44 45 53 55 75 80 81

Your boiler has detected that a control button has been stuck or held down for too long, which usually happens if a button is physically jammed.

What the manual says

DIY fix possible

Avoid the next call-out bill

All 33 fault codes on the Alkon C 28 HE

Related guides you might find useful

Is boiler cover worth it?

When to replace your boiler

Boiler service cost

Recently viewed