A 05 Medium

Vokera A 05 Fault Code

Also written as A05 — same fault.

The Vokera A 05 fault code means: your boiler's computer has hit a minor, temporary hiccup and has paused itself to prevent any potential issues.. It appears on 1 Vokera model in our database.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description: Temporary internal fault.
Typical repair cost £0-120 (including labour)

DIY fix possible

Turn the boiler off at the fused spur or power switchWait for 60 secondsTurn the power back on to allow the system to reboot and clear the temporary fault

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →
Boiler cover options

Avoid the next call-out bill

A cover plan would handle faults like A 05: 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.

Vokera models that show the A 05 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Vokera A 05 fault code information on this page is sourced and cross-checked against the official Vokera service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026