Emergency
09 on Baxi 824 SYSTEM

Your boiler has detected an issue with the internal wiring or the valve that controls the gas supply, meaning it has safely shut down to prevent unsafe operation.

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

What the manual says

Manufacturer manual

Gas valve connection cable / Gas valve fault

From this model's manual
Verified against the Baxi/Baxi Bmgc Baxi 824 System Fbm 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 emergency 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 →

Avoid the next call-out bill

A cover plan would handle faults like 09: 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

All 17 fault codes on the 824 SYSTEM

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

Related guides you might find useful