Biasi Riva Advance M96.28SM Fault codes & diagnostics

10 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

Combi Natural Gas 28 kW Discontinued

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Severity at a glance

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10 High
Just want the most common Biasi Riva Advance M96.28SM faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes

All 10 documented codes

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30c

Your boiler has detected that the water temperature has got too high and has shut down as a safety precaution.

High DIY-safe £120-280

What to check first

  1. Check that all radiator valves are fully open
  2. Check that the system pressure is between 1 and 1.5 bar on the pressure gauge
  3. Once the boiler has cooled down, press the reset button

Parts commonly replaced

  • Overheat Thermostat
  • Central Heating NTC Sensor
  • Circulation Pump
Full explanation for 30c
ER + 14 + Reset

Your boiler has detected a problem with the internal fan or the system that exhausts fumes, and it cannot safely start until this is investigated.

High Engineer only £120-£350

Parts commonly replaced

  • Fan assembly
  • Air pressure switch
  • Venturi tube
Full explanation for ER + 14 + Reset
ER + 25 + Reset

Your boiler has detected that it is overheating, which has caused it to shut down to prevent any internal damage.

High Engineer only £120-350

Parts commonly replaced

  • Main Heat Exchanger
  • Circulating Pump
  • Overheat Thermostat
  • NTC Temperature Sensor
Full explanation for ER + 25 + Reset
ER + 69

Your boiler has detected an internal electronic communication error and has locked itself out for safety.

High Engineer only £180-350

Parts commonly replaced

  • Main Printed Circuit Board (PCB)
  • Internal Wiring Harness
Full explanation for ER + 69
ER 01 + Reset

Your boiler has failed to light or was unable to detect a flame, causing it to lock out for safety.

High DIY-safe £100-280

What to check first

  1. Check that your gas supply is turned on at the meter
  2. If you have a prepay meter, check that you have credit
  3. Press and hold the Reset button for five seconds

Parts commonly replaced

  • Ignition Electrode
  • Gas Valve
  • Flame Sensing Electrode
  • PCB
Full explanation for ER 01 + Reset
ER 02 + Reset

Your boiler has sensed it is getting too hot and has shut itself down for safety.

High DIY-safe £100-280

What to check first

  1. Turn the selector switch to the 'R' position for a few seconds and then back to the original setting.
  2. Check that your radiator valves are fully open to allow water to flow.
  3. Ensure your boiler pressure is between 1 and 1.5 bar on the pressure gauge.

Parts commonly replaced

  • Overheat Thermostat
  • Circulation Pump
  • Main Heat Exchanger
Full explanation for ER 02 + Reset
ER 03 + Reset

Your boiler has detected a problem with how it disposes of waste gases, causing it to shut down for safety purposes.

High Engineer only £120-280

Parts commonly replaced

  • Air pressure switch
  • Fan assembly
  • Flue venturi
Full explanation for ER 03 + Reset
ER 10 + reset

Your boiler has detected that the water pressure is too low, preventing it from heating your home safely.

High DIY-safe £0-120

What to check first

  1. Locate the filling loop (braided flexible hose) underneath the boiler.
  2. Slowly open the valve(s) until you hear water entering the system.
  3. Monitor the pressure gauge until it reaches between 1.0 and 1.5 bar.
  4. Close the valves tightly and press the reset button on the control panel.

Parts commonly replaced

  • Filling loop
  • Pressure sensor
  • Expansion vessel
Full explanation for ER 10 + reset
Li

Your boiler has detected that the water inside the system is getting too hot, causing it to shut down for safety.

High DIY-safe £120-350

What to check first

  1. Check that all your radiator valves are fully open
  2. Ensure the boiler pressure gauge is between 1.0 and 1.5 bar
  3. Reset the boiler by turning the control knob to the 'R' position for 5 seconds

Parts commonly replaced

  • Circulation pump
  • Overheat thermostat
  • Main Heat Exchanger (if scaled)
Full explanation for Li
LP

Your boiler has detected that the water pressure is too low to operate safely.

High DIY-safe £0-120

What to check first

  1. Locate the filling loop valves underneath the boiler.
  2. Slowly open both taps to let fresh water into the system.
  3. Close the taps once the pressure gauge on the front of the boiler reaches between 1 and 1.5 bar.

Parts commonly replaced

  • Filling loop hose
  • Water pressure switch
  • Expansion vessel
Full explanation for LP