Ravenheat HE80 98S Fault codes & diagnostics

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

Combi Natural Gas 24 kW 2000-2005 Discontinued
Download the Ravenheat HE80 98S manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

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Severity at a glance

Each cell = one fault code. Hover to identify.
7 High 1 Medium

All 8 documented codes

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01

Your boiler has tried to start up but failed to light the flame, so it has shut itself down to prevent any gas build-up.

High Engineer only £120-250

Parts commonly replaced

  • Ignition electrode
  • Gas valve
  • PCB

Related codes

02

Your boiler has stopped working because it cannot correctly read its own internal water temperature, so it has shut down to prevent overheating.

High Engineer only £120-220

Parts commonly replaced

  • NTC Temperature Sensor
  • Wiring harness

Related codes

04

Your boiler has detected that it is running too hot and has automatically shut itself down to prevent damage.

High Engineer only £120-250

Parts commonly replaced

  • High limit thermostat
  • Pump
  • Diverter valve
  • Heat exchanger

Related codes

06

Your boiler has stopped producing hot water because it is having trouble reading the temperature of the water coming out of the tap.

Medium Engineer only £120-180

Parts commonly replaced

  • DHW NTC thermistor sensor
  • Wiring harness
12

Your boiler has stopped providing heating because it cannot accurately measure the temperature of the water inside the system.

High Engineer only £120-180

Parts commonly replaced

  • Central Heating NTC Sensor
  • Wiring Harness
28

Your boiler has stopped heating because there isn't enough water circulating inside the system to operate safely.

High DIY-safe £80-150

What to check first

  1. Locate the filling loop (usually a silver braided hose with one or two valves near the boiler)
  2. Open the valve(s) slowly to allow mains water into the system
  3. Watch the pressure gauge on the front of the boiler until the needle reaches the green zone, typically between 1.0 and 1.5 bar
  4. Close the valve(s) tightly and restart the boiler

Parts commonly replaced

  • Pressure relief valve
  • Pressure gauge
  • Expansion vessel
30

Your boiler has detected that the exhaust gases are too hot, so it has safely shut down to prevent damage to the unit.

High Engineer only £150-300

Parts commonly replaced

  • Flue temperature sensor
  • NTC thermistor
  • Primary heat exchanger
31

Your boiler has stopped working because it cannot correctly detect the temperature of the water inside it, which prevents it from firing up safely.

High Engineer only £150-250

Parts commonly replaced

  • NTC Temperature Sensor
  • Wiring harness

Related codes