Ideal Esprit HE Fault codes & diagnostics

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

Combi Natural Gas 24-35 kW 2007-2012 Discontinued
GC Numbers 47-348-4347-348-4447-348-45

Replaced by: Vogue Gen2

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Each cell = one fault code. Hover to identify.
27 High 1 Low

All 28 documented codes

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93 H.....4....

Your boiler has detected that it is firing without enough water inside, which has caused the temperature sensors to overheat or report a fault.

High Engineer only £120-£280

Parts commonly replaced

  • Flow Thermistor
  • Return Thermistor
  • Main PCB
94 H......F.....

Your boiler is struggling to detect the flame needed to heat your water, which is causing the system to shut down for safety.

High DIY-safe £120-280

What to check first

  1. Check if other gas appliances in your home, like a hob, are working to ensure gas is reaching the property
  2. Check that your prepaid gas meter has credit
  3. Press the 'Reset' button on the front of the boiler once

Parts commonly replaced

  • Flame Sensing Electrode
  • Ignition Lead
  • Gas Valve
95 H......n.....

Your boiler has detected that the electrical wiring coming into the unit is connected backwards, which is preventing it from starting up for safety reasons.

High Engineer only £80-160

Parts commonly replaced

  • Main Power Cable
  • Control PCB

Related codes

F-

Your boiler has stopped working and is displaying a specific alert code to indicate it has detected a safety concern and shut itself down to prevent damage.

High Engineer only £120-350

Parts commonly replaced

  • Printed Circuit Board
  • Ignition Electrode
  • Gas Valve

Related codes

H n

Your boiler is nearing the end of its programmed maintenance cycle and is displaying a service reminder, but it should still provide heat and hot water for now.

Low Engineer only £80-120

Parts commonly replaced

  • None - Standard service required
  • Burner seal (standard maintenance part)
H......F........

Your boiler has detected an electrical fault with the sensor that confirms the flame is lit, preventing it from firing up for your safety.

High Engineer only £120-£280

Parts commonly replaced

  • Flame Sensing Electrode
  • Ignition Lead
  • Main Printed Circuit Board (PCB)
H......n........

Your boiler has detected that the electrical wiring coming from your home's power supply is connected the wrong way around.

High Engineer only £90-180

Parts commonly replaced

  • Internal wiring harness
  • Printed Circuit Board (PCB)
H.....1.....

Your boiler has detected an issue with the sensor that monitors the temperature of the water leaving the unit, preventing it from heating correctly.

High Engineer only £90-160

Parts commonly replaced

  • Flow Thermistor (NTC sensor)
  • Wiring Harness
  • Main PCB

Related codes

H.....4......

Your boiler has detected that a safety sensor in the exhaust pipe is reporting an incorrect temperature reading or has developed a fault.

High Engineer only £120-£210

Parts commonly replaced

  • Flue Thermistor
  • Wiring Harness
  • Main PCB
H1

Your boiler has detected low water pressure in the system, which is preventing it from heating up.

High DIY-safe £0-120

What to check first

  1. Locate the filling loop (usually a silver flexible hose) underneath your boiler.
  2. Slowly open the valve(s) until you hear water flowing and watch the pressure gauge.
  3. Close the valves once the needle reaches 1.5 bar on the gauge.

Parts commonly replaced

  • Filling loop
  • Pressure sensor
  • Expansion vessel
Showing 11–20 of 28
H2

Your boiler has detected an internal electronic communication failure or a technical error that requires a deep-level diagnosis by a professional.

High Engineer only £120-450

Parts commonly replaced

  • Main Printed Circuit Board (PCB)
  • Wiring Harness
H3

Your boiler has detected that the water temperature has reached a dangerously high level, causing it to shut down to prevent damage.

High Engineer only £120-£450

Parts commonly replaced

  • Pump
  • Overheat Thermostat
  • Main PCB
  • Heat Exchanger (de-scale)
H4

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.

High DIY-safe £0-120

What to check first

  1. Locate the filling loop (usually a silver braided hose with small black valves underneath or near the boiler).
  2. Slowly open the valve(s) until you hear water flowing and the pressure gauge rises to 1.5 bar (the green section).
  3. Close the valves tightly and press the 'Restart' or 'Reset' button on the control panel.

Parts commonly replaced

  • External Filling Loop
  • Expansion Vessel
  • Pressure Relief Valve
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

Parts commonly replaced

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

Related codes

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

Parts commonly replaced

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

Related codes

HA

Your boiler has developed a communication or hardware circuit error that has caused it to stop providing both heating and hot water.

High Engineer only £180-450

Parts commonly replaced

  • Main Printed Circuit Board (PCB)
  • Control Knob Interface
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

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
HF

Your boiler has failed to ignite after several attempts, meaning it cannot create the flame needed to heat your home or water.

High DIY-safe £100-350

What to check first

  1. Check that your gas emergency control valve is open and you have credit on your gas meter.
  2. If it is freezing outside, check if your white plastic condensate pipe is frozen and thaw it with warm water.
  3. Reset the boiler by turning the mode knob to 'RE' and then back to your desired setting.

Parts commonly replaced

  • Ignition Electrode
  • Gas Valve
  • PCB (Printed Circuit Board)
  • Flame Sensing Probe

Related codes

L-

Your boiler has detected a internal fault and has safely shut itself down to prevent damage, but it requires a secondary code to identify the specific issue.

High Engineer only £120-250

Parts commonly replaced

  • Printed circuit board
  • Ignition electrode
  • Gas valve
L.......A........

Your boiler has shut down because it has detected it is getting too hot, usually due to a lack of water circulation or a blockage in the system.

High DIY-safe £120-£350

What to check first

  1. Check that your boiler pressure is between 1 and 1.5 bar on the pressure gauge
  2. Ensure all radiator valves are fully open and not turned off
  3. Check if any bypass valves are closed and try resetting the boiler once cooled

Parts commonly replaced

  • Pump
  • Overheat Thermostat
  • Main Heat Exchanger
  • Thermistor

Related codes

Showing 21–28 of 28
L.....E...... or H.....E......

Your boiler’s internal computer has encountered an electronic glitch or hardware failure and cannot operate safely.

High Engineer only £280-550

Parts commonly replaced

  • Main Printed Circuit Board (PCB)
  • Wiring Harness

Related codes

L....8.....

Your boiler has stopped working because the fan that removes exhaust fumes is not spinning correctly or communicating with the system.

High Engineer only £220-£450

Parts commonly replaced

  • Fan Assembly
  • Wiring Harness
  • Main PCB
L8

Your boiler has detected an internal communication error between its electronic control boards or a software fault.

High Engineer only £180-350

Parts commonly replaced

  • Main PCB
  • Display Board
  • Connection Loom
L9

Your boiler has failed to light several times and has locked itself out for safety reasons.

High DIY-safe £100-350

What to check first

  1. Check if your gas supply is active (e.g. check other gas appliances or pre-payment meter credit)
  2. Press and hold the 'Reset' button for 2 seconds
  3. Once the boiler restarts, monitor it to see if the flame stays lit

Parts commonly replaced

  • Ignition Electrode
  • Flame Sensing Probe
  • Gas Valve
  • Printed Circuit Board (PCB)

Related codes

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

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

LA/HA

Your boiler has become too hot and has shut itself down as a safety precaution to prevent damage.

High DIY-safe £120-350

What to check first

  1. Check that your radiator valves are open and not turned to zero
  2. Ensure there is enough water pressure in the system (typically between 1 and 1.5 bar)
  3. Press the reset button to see if the fault clears

Parts commonly replaced

  • Circulation Pump
  • Overheat Thermostat
  • Main Heat Exchanger
LE

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

High DIY-safe £0-120

What to check first

  1. Locate the filling loop (a flexible silver hose with one or two small taps/levers) underneath your boiler.
  2. Slowly open the tap or taps until you hear water entering the system.
  3. Watch the pressure gauge and close the taps firmly once it reaches 1.5 bar, then restart the boiler.

Parts commonly replaced

  • Filling loop valve
  • Pressure sensor
  • Expansion vessel recharge
LF

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

High DIY-safe £100-£350

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