High
110 on Baxi 615 System 15

Your Baxi boiler has temporarily stopped working because it has lost proper internal communication between its main electronic parts.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

What the manual says

Manufacturer manual

Check all PCB connections / Go to section H

From this model's manual
Verified against the Baxi/Baxi Bmgc Baxi System 618 Baxi System 615 618 624 Instal 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 is a high severity fault. Stop using the boiler and call 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 110: 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 fault codes

E110View →118View →133View →

All 17 fault codes on the 615 System 15

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

0915202840109118125128130133134135160321384

Related guides you might find useful

When to replace your boiler

7 signs repair isn't worth it anymore.

Read →

Is boiler cover worth it?

Break-even maths on monthly cover.

Read →

Boiler service cost

What a UK service costs and what a proper one includes.

Read →