Biasi Riva Plus HE 24C ErP Fault codes & diagnostics

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

Combi Gas 2015-present
GC Number 47-583-41
Download the Biasi Riva Plus HE 24C ErP manualThe official installation and service manual (PDF), the document these fault codes were read from. PDF

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Severity at a glance

Each cell = one fault code. Hover to identify.
2 Emergency 6 High 3 Medium

Which version do you have?

The GC number on your boiler's data badge identifies the exact appliance and production years, as recorded in the UK Product Characteristics Database.

GC number Appliance (register name) Produced
47-583-41 Riva Plus HE 24C ErP 2015–present

Appliance names and production years are taken from the UK Product Characteristics Database (the SAP/SEDBUK register). Where a GC number is also printed in this model's own manufacturer manual, both sources were checked to agree.

All 11 documented codes

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Faulty air pressure sensor

Your boiler has detected an issue with the sensor that manages internal airflow, so it has safely shut down to prevent incorrect operation.

High Engineer only £150-250

Parts commonly replaced

  • Air pressure switch
  • Flue fan
  • Silicone pressure sensing tubes
Faulty flue temperature probe NTC

Your boiler has detected an issue with the sensor that measures the temperature of the exhaust gases leaving the flue.

Medium Engineer only £120-250

Parts commonly replaced

  • Flue NTC temperature sensor
  • Wiring harness
Faulty primary circuit

Your boiler has temporarily stopped working because the water pressure inside the heating system has dropped too low.

High DIY-safe

What to check first

  1. Locate the filling loop underneath your boiler.
  2. Open the valves slowly to let water into the system until the pressure gauge reads between 1.0 and 1.5 bar.
  3. Close the valves tightly and reset your boiler.

Parts commonly replaced

  • Filling loop
  • Pressure relief valve
  • Pressure sensor

Related codes

Flame detection error

Your boiler is trying to start up, but it cannot sense the flame once the gas ignites, so it safely shuts itself down to prevent any gas build-up.

High Engineer only £120-250

Parts commonly replaced

  • Flame sensing electrode
  • Ignition lead
  • Printed Circuit Board (PCB)

Related codes

Lack of burner ignition

Your boiler is trying to start up, but it is failing to light the flame to provide heating and hot water.

High Engineer only £150-350

Parts commonly replaced

  • Ignition electrode
  • Gas valve
  • Printed Circuit Board (PCB)

Related codes

Lack of power supply

Your boiler is not receiving any electrical power, which stops it from working entirely.

High DIY-safe £90-250

What to check first

  1. Check that the fused spur switch supplying the boiler is turned on.
  2. Check your home's fuse box or consumer unit to see if a trip switch or fuse has blown.
  3. Try plugging a lamp into a nearby socket to verify the electrical supply is working.

Parts commonly replaced

  • Fuse
  • Printed Circuit Board (PCB)

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