Ideal Esprit HE Fault codes & diagnostics

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

Combi Natural Gas 24-35 kW 2007-2012 Discontinued

Replaced by: Vogue Gen2

Choose your boiler type

The Esprit HE range comes in 6 types

Pick the one you have. The fault codes, GC numbers and manual differ by type.

24 11 codes · 1 GC number 30 11 codes · 1 GC number 35 11 codes · 1 GC number HE24+P 1 codes · 1 GC number HE30+P 1 codes · 1 GC number HE35+P 1 codes · 1 GC number
Each model has its own manual A family spans several manuals, one per model or generation. Pick your model above and its page has the manual its fault codes were read from.

The fault code is already on your display

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.
12 High 1 Low
Fault codes

All 13 documented codes

Tap any card for details

92

Your boiler has detected an issue where a temperature sensor appears to be overheating or registering a dry state inside the system.

High Engineer only £150-300 Shared across the Esprit HE range

Parts commonly replaced

  • NTC Thermistor
  • Heat Exchanger Sensor

Related codes

Full explanation for 92
93

Your boiler is failing to detect a steady flame when it tries to fire up, so it has safely shut down to prevent any unburnt gas from building up.

High Engineer only £150-300 Shared across the Esprit HE range

Parts commonly replaced

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

Related codes

Full explanation for 93
94

Your boiler has detected that the electrical supply wires have been incorrectly connected or reversed.

High Engineer only £90-150 Shared across the Esprit HE range
Full explanation for 94
H

Your boiler has temporarily stopped working as a safety precaution due to a temporary operational issue.

High DIY-safe Shared across the Esprit HE range

What to check first

  1. Check if your gas supply is working normally by testing another gas appliance like the cooker.
  2. Locate the reset button on your boiler's control panel.
  3. Press and hold the reset button for 3 to 5 seconds to clear the blocking error and restart the boiler.

Related codes

Full explanation for H
H9

Your boiler has detected that it is getting too hot and has shut down as a safety precaution to prevent damage.

High Engineer only £120-350 Shared across the Esprit HE range

Parts commonly replaced

  • Circulation Pump
  • Overheat Thermostat
  • Main Heat Exchanger (Descaling)

Related codes

Full explanation for H9
H9/L9

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

High Engineer only £150-300 Shared across the Esprit HE range

Parts commonly replaced

  • Primary flow thermistor
  • Central heating pump
  • Diverter valve
  • Heat exchanger

Related codes

Full explanation for H9/L9
HE

Your boiler has detected that the water inside it is getting too hot, causing it to shut down for safety.

High DIY-safe £100-280 Shared across the Esprit HE range

What to check first

  1. Check that all radiator valves are fully open
  2. Ensure the boiler pressure is between 1 and 1.5 bar on the gauge
  3. Wait for the unit to cool down and press the reset button

Parts commonly replaced

  • Overheat Thermostat
  • Circulation Pump
  • Thermistor
Full explanation for HE
Hn

Your boiler is currently performing a routine self-check or waiting to restart after a temporary interruption, and usually clears on its own without needing any action.

Low Engineer only Shared across the Esprit HE range

Related codes

Full explanation for Hn
L

Your boiler has safely shut itself down due to a safety lockout, meaning it has stopped working to prevent potential hazards.

High Engineer only £100-£250 Shared across the Esprit HE range

Parts commonly replaced

  • Ignition lead
  • Electrodes
  • Gas valve
  • Printed Circuit Board (PCB)

Related codes

Full explanation for L
L9

Your boiler has detected that it is running much hotter than it should be and has switched itself off to prevent permanent damage.

High Engineer only £150-300 Shared across the Esprit HE range

Parts commonly replaced

  • Pump
  • Diverter valve
  • Primary flow sensor
  • Heat exchanger

Related codes

Full explanation for L9
LA

Your boiler has failed to ignite after several attempts, meaning it cannot provide heating or hot water until reset or repaired.

High DIY-safe £120-350 Shared across the Esprit HE range

What to check first

  1. Check if your gas prepay meter has credit and that the gas supply valve is open
  2. Press and hold the 'Mode' or 'Reset' knob for two seconds
  3. Check that the white condensate pipe leaving the boiler is not frozen if it is winter

Parts commonly replaced

  • Ignition Electrode
  • Gas Valve
  • Spark Generator

Related codes

Full explanation for LA
LE

Your boiler's main control computer is experiencing a communication or processing error, which has caused it to stop working for your safety.

High Engineer only £250-450 Shared across the Esprit HE range

Parts commonly replaced

  • Main PCB
  • Wiring harness

Related codes

Full explanation for LE
LF

Your boiler has failed to ignite after several attempts, meaning it cannot provide heating or hot water.

High DIY-safe £100-£350 Shared across the Esprit HE range

What to check first

  1. Check if your gas supply is active by testing another gas appliance like a hob.
  2. Check that the white condensate pipe exiting your home hasn't frozen in cold weather.
  3. Press the 'Reset' button on the front of the boiler panel to restart the ignition sequence.

Parts commonly replaced

  • Ignition Electrode
  • Gas Valve
  • Printed Circuit Board (PCB)
  • Flame Sensing Probe
Full explanation for LF
Status & diagnostic codes

6 operating states & engineer diagnostics

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

H1 Diagnostic Your boiler has detected low water pressure in the system, which is preventing it from heating up. H2 Diagnostic Your boiler has detected an internal electronic communication failure or a technical error that requires a deep-level diagnosis by a professional. H3 Diagnostic Your boiler has detected that the water temperature has reached a dangerously high level, causing it to shut down to prevent damage. H4 Diagnostic Your boiler has detected low water pressure in the system, which means it cannot circulate enough water to heat your home or provide hot water safely. HF Diagnostic Your boiler has failed to ignite after several attempts, meaning it cannot create the flame needed to heat your home or water. L8 Diagnostic Your boiler has detected an internal communication error between its electronic control boards or a software fault.