BoilerFaultCodesWhat the manual says
Manufacturer manualFlue temperature probe NTC lock out
From this model's manual
Verified against the Biasi/Biasi Riva Advance M96 24sm installation & service 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 Flue temperature probe NTC lock out: no call-out fees, no surprise bills.
Approved partner
Get a quote →
Domestic Appliance Guard
Unlimited call-outs, 24/7 helpline, no price-hike promise
Affiliate links. We may earn a commission at no extra cost to you.
Related fault codes
All 13 fault codes on the Riva Advance HE M110B.24SR/C
Seeing a different code? Every code this model can display, in one place.
Excessive temperature on primary circuitFaulty c.h. temperature probe NTC.Faulty d.h.w temperature probe NTCFaulty Electronic control/ignition p.c.b.Faulty external temperature probe NTCFaulty fan control systemFaulty primary circuitFlame detection errorLack of burner ignitionLack of power supply or faulty electronic control p.c.b.Open flue temperature probe NTCSafety thermostat lock out