Emergency
10 on Biasi Antares Combi

Your boiler has shut down because it has detected an unsafe build-up of heat or exhaust gases in the flue system.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

Lockout due to tripping of the flue gas probe and thermal fuse.

From this model's manual
Verified against the Biasi/Biasi Antares Combi installation & service manual, page 13.
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 →
Boiler cover options

Avoid the next call-out bill

A cover plan would handle faults like 10: 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 +10 +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 gas valveFaulty ignitionL1

Related guides you might find useful

Banging / kettling / whistling noise

Each noise points to a different fault.

Read →

Boiler won't turn on — 9-step checklist

Work through these before the call-out.

Read →

Radiators cold at the bottom

Sludge build-up — needs flushing, not bleeding.

Read →