Ravenheat RSF 82E Fault codes & diagnostics

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

Combi Natural Gas 24 kW 1998 onwards Discontinued
GC Number 47-581-18
Download the Ravenheat RSF 82E manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

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Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Severity at a glance

Each cell = one fault code. Hover to identify.
9 High
Versions & GC numbers

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
47-581-18 RSF 82 E 1998–present
Just want the most common Ravenheat RSF 82E faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes

All 9 documented codes

Tap any card for details

02

Your boiler has likely overheated or a safety sensor has detected an incorrect temperature, causing it to shut down for safety.

High DIY-safe £100-250

What to check first

  1. Locate the reset button or control knob on the front panel
  2. Press and hold the reset button for five seconds
  3. Check that your radiator valves are open and that the system pressure is between 1 and 1.5 bar

Parts commonly replaced

  • Overheat Thermostat
  • Temperature Sensor (NTC Thermistor)
  • Circulation Pump

Related codes

Full explanation for 02
04

Your boiler has switched itself off because it has reached an unsafe temperature, likely due to a circulation issue or a faulty internal safety switch.

High Engineer only £120-250

Parts commonly replaced

  • Overheat Thermostat
  • Circulation Pump
  • Limit Thermistor

Related codes

Full explanation for 04
12

Your boiler's internal thermometer that measures the temperature for your central heating has stopped working correctly, and your heating will likely fail to turn on as a result.

High Engineer only £90-160

Parts commonly replaced

  • NTC Heating Sensor
  • Sensor Wiring Harness

Related codes

Full explanation for 12
17

Your boiler has detected an electrical problem with the fan, which means it cannot safely clear away waste gases and will not start.

High Engineer only £180-350

Parts commonly replaced

  • Fan assembly
  • Printed Circuit Board (PCB)
  • Wiring harness
Full explanation for 17
28

Your boiler has detected that there is not enough water pressure or flow to operate safely, which is preventing your heating and hot water from working.

High DIY-safe £120-280

What to check first

  1. Check the pressure gauge on the front of the boiler; it should be between 1 and 1.5 bar.
  2. If the pressure is too low, use the external filling loop to top up the system with water.
  3. Reset the boiler once the correct pressure is reached to see if the fault clears.

Parts commonly replaced

  • Low water pressure switch
  • Circulation pump
  • Expansion vessel recharge

Related codes

Full explanation for 28
30

Your boiler has detected that the exhaust gases are too hot or the sensor monitoring them has failed, causing the system to shut down for safety.

High Engineer only £120-280

Parts commonly replaced

  • Flue Limit Thermostat
  • Main Heat Exchanger
  • NTC Sensor
Full explanation for 30
31

Your boiler has detected that a safety sensor monitoring the exhaust fumes is faulty or has recorded an unsafe temperature, causing the system to shut down for your protection.

High Engineer only £90-160

Parts commonly replaced

  • Flue Gas Temperature Sensor (NTC)
  • Wiring Harness
  • Main Circuit Board (PCB)

Related codes

Full explanation for 31
E23

Your boiler has detected a fault with the part that monitors the temperature of the exhaust gases, causing the system to shut down for safety.

High Engineer only £120-220

Parts commonly replaced

  • Flue Sensor (NTC)
  • Wiring Harness
  • Main PCB

Related codes

Full explanation for E23
E24

Your boiler has detected a problem with the sensor that monitors the temperature of the water returning from your radiators, which prevents it from heating your home correctly.

High Engineer only £90-160

Parts commonly replaced

  • CH Return NTC Thermistor
  • Wiring harness connection

Related codes

Full explanation for E24
Status & diagnostic codes

1 operating states & engineer diagnostics

Not faults — these are normal operating states. Tap to expand.

AF Status Your boiler has detected that the internal temperature is getting too low and has automatically activated its built-in heater to prevent the pipes from freezing.