High
Faulty gas valve on Biasi Antares Combi

Your boiler is unable to light the gas burner because it isn't receiving any fuel, likely due to a mechanical failure or an electrical communication issue with the gas control valve.

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

Faulty on-off operators or not electrically supplied

Shared across the Antares range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s 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 Faulty gas valve: 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 74 fault codes on the Antares Combi

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

1 +2 +3 +4 +5 +6 +7 +8 +1010 +11 +1212 +1313 +1414 +1515 +1616 +1818 +1919 +2020 +2121 +22 +2323 +2424 +2525 +2626 +4040 +4242 +44 +5050 +6262 +6565 +6868 +77 +7878 +7979 +8989 +9191 +9696+9799E02E04E14E15E16Faulty condensate drainageFaulty flame detectionFaulty ignitionL1

Related guides you might find useful

Pilot light keeps going out

Older boilers: thermocouple, draught or gas supply.

Read →

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 →