BoilerFaultCodesWhat the manual says
Manufacturer manualExcessive temperature on primary circuit
From this model's manual
Verified against the Biasi/Biasi Riva Compact He M96 installation & service manual.
Engineer required
This fault requires 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 Excessive temperature on primary circuit: 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.
All 12 fault codes on the M96E
Seeing a different code? Every code this model can display, in one place.
Faulty air pressure switchFaulty c.h. temperature probe NTCFaulty d.h.w temperature probe NTCFaulty Electronic control/ignition p.c.b.Faulty flue temperature probe NTCFaulty primary circuitFlue temperature probe NTC lockoutLack of burner ignitionLack of power supply or faulty electronic control p.c.b.N/ASafety thermostat lockout