Common problems guide

The most common Ravenheat White Heat WH 80/90 problems

The faults most likely to send a Ravenheat White Heat WH 80/90 into lockout — with plain-English causes, what to check first, estimated repair costs and whether you need a Gas Safe engineer.

This model is discontinued. Parts can be harder to source and expensive. If repair costs are mounting, a new A-rated boiler may be the smarter choice.
10 documented codes
6 most common
2 DIY-safe checks
4 engineer needed

The 6 most common faults

01
E8 High DIY-safe

Your boiler has stopped working because the internal water pressure has dropped too low to operate safely.

What to try first

Locate the filling loop (a flexible metal hose with one or two valves) underneath the boiler.Open the valve(s) slowly to allow cold mains water into the system.Watch the pressure gauge on the front of the boiler until the needle reaches the green zone (typically 1.0 to 1.5 bar).Close the valve(s) tightly and ensure no water is leaking from the connection.

Est. cost
£80-120
Parts
Pressure relief valve, Pressure gauge, Expansion vessel
Full guide for E8
02
28 High DIY-safe

Your boiler has stopped working because it cannot detect enough water pressure inside the system to operate safely.

What to try first

Check the pressure gauge on the front of your boiler to see if it is below 1.0 bar.If low, use your internal filling loop or external key to top up the system pressure to between 1.0 and 1.5 bar.Turn the boiler off and back on again to clear the fault code.

Est. cost
£90-250
Parts
Pressure sensor, Central heating pump, Pressure relief valve
Full guide for 28
03
E1 High Engineer

Your boiler has stopped working because it cannot light or stay lit, meaning it is currently unable to provide heating or hot water.

Est. cost
£120-250
Parts
Ignition electrode, Gas valve, Printed Circuit Board (PCB)
Full guide for E1
04
17 High Engineer

Your boiler has detected an issue with the internal air circulation fan, which is preventing it from safely lighting and operating.

Est. cost
£180-350
Parts
Fan assembly, Printed Circuit Board (PCB), Wiring harness
Full guide for 17
05
01 High Engineer

Your boiler is failing to light the flame needed to produce heat or hot water, meaning it has safely shut itself down to prevent a gas buildup.

Est. cost
£120-250
Parts
Ignition electrode, Gas valve, Control board (PCB)
Full guide for 01
06
12 High Engineer

Your boiler has detected that the water temperature is not rising as expected, likely because of a faulty sensor or a problem with water flowing through the system.

Est. cost
£120-220
Parts
NTC heating sensor, Central heating pump
Full guide for 12
Parts most often replaced

on the Ravenheat White Heat WH 80/90

Pressure relief valvePressure gaugeExpansion vesselPressure sensorCentral heating pumpIgnition electrode

Based on parts cited in our fault code database. Your engineer will confirm what's actually needed after diagnosis.

Call a Gas Safe engineer if…

  • You can smell gas or see signs of a leak
  • The Ravenheat shows an Emergency or High severity code
  • The boiler keeps locking out after repeated resets
  • You've tried the DIY checks and the fault hasn't cleared
  • There's visible water leaking from the boiler
  • The flame is yellow or orange instead of blue
See the full 10-code list for the Ravenheat White Heat WH 80/90

Related guides

Boiler losing pressure → No hot water → When to replace → Symptom checker →