Common problems guide

The most common Ravenheat HE80 98S problems

The faults most likely to send a Ravenheat HE80 98S 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.
3 documented codes
3 most common
2 DIY-safe checks
1 engineer needed

The 3 most common faults

01
08E High DIY-safe

Your boiler has stopped working because the water pressure inside your heating system has dropped too low to operate safely.

What to try first

Locate the external filling loop, which is usually a silver braided hose with one or two valves located underneath the boiler.Open the valve(s) slowly to allow mains water into the system while watching the pressure gauge on the front of the boiler.Stop filling once the needle reaches the green zone, typically between 1.0 and 1.5 bar, then ensure the valves are tightly closed.

Est. cost
£80-150
Parts
Pressure relief valve, Pressure sensor, Expansion vessel
Full guide for 08E
02
E08 High DIY-safe

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

What to try first

Locate the external filling loop, which is a silver braided hose with one or two valves underneath the boiler.Slowly open the valve(s) to allow mains water into the system while watching the pressure gauge on the front of the boiler.Stop filling once the needle reaches the green zone, typically between 1.0 and 1.5 bar, and ensure the valves are fully closed.

Est. cost
£80-150
Parts
Pressure relief valve, Expansion vessel, Pressure sensor
Full guide for E08
03
E01 High Engineer

Your boiler has stopped working because it cannot light the internal flame needed to heat your home's water.

Est. cost
£120-250
Parts
Ignition electrode, Gas valve, PCB
Full guide for E01
Parts most often replaced

on the Ravenheat HE80 98S

Pressure relief valvePressure sensorExpansion vesselIgnition electrodeGas valvePCB

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 3-code list for the Ravenheat HE80 98S

Related guides

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