Unknown
Er 69 on Biasi Advance Plus

Biasi Advance Plus fault code Er 69

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

What the manual says

Manufacturer manual

Wiring error lockout

From this model's manual
Verified against the Biasi/Biasi Advance 25c Combi 2 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.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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 Er 69: 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 35 fault codes on the Advance Plus

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

An 11Er 01Er 01 + RESETEr 02Er 02 + RESETEr 03Er 03 + RESETEr 04Er 04 +Er 05Er 05 +Er 06Er 06 +Er 07Er 07 +Er 08Er 08 +Er 09Er 09 +Er 10Er 10 + RESETEr 11Er 12Er 12 +Er 13Er 13 +Er 14Er 14 +Er 14 + RESETEr 19Er 19 +Er 25Er 25 + RESETLi 01

Related guides you might find useful

Is boiler cover worth it?

Break-even maths on monthly cover.

Read →

When to replace your boiler

7 signs repair isn't worth it anymore.

Read →

New boiler cost 2026

Realistic UK prices for a swap.

Read →