Ideal Vogue System Fault codes & diagnostics

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

System Natural Gas 15-32 kW 2013-present
Download the Ideal Vogue System 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.
2 Emergency 30 High 2 Medium 2 Low

All 36 documented codes

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4.4

Your boiler is struggling to keep a flame lit, which means the system has safely shut itself down to prevent a fault.

High DIY-safe £100-£350

What to check first

  1. Check that your gas pre-payment meter (if you have one) has credit.
  2. Verify that other gas appliances, like a hob, are working correctly to rule out a gas supply issue.
  3. Restart the boiler by pressing the 'Reset' button on the display panel.

Parts commonly replaced

  • Ignition electrode
  • Flame sensing probe
  • Gas valve
  • Condensate trap (clearing a blockage)
4.5

Your boiler has overheated to a critical level and a safety component has permanently cut the power to prevent serious damage.

High Engineer only £180-350

Parts commonly replaced

  • Main Heat Exchanger
  • Thermal Fuse
  • Heat Exchanger Wiring Harness
  • Overheat Thermostat
4.6

Your boiler thinks it sees a flame before it has even started the ignition process, which is a safety conflict that prevents it from running.

High Engineer only £180-450

Parts commonly replaced

  • Flame sensing electrode
  • Gas valve
  • Main PCB (Printed Circuit Board)
4.7

Your boiler has detected a problem with the internal sensor that measures 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

Related codes

4.8

Your boiler has lost communication with the sensor that monitors the outdoor temperature, meaning it might not heat your home as efficiently as usual.

Low DIY-safe £90-160

What to check first

  1. Check the outdoor sensor for any obvious physical damage or loose wires
  2. Ensure the sensor is not covered by snow, debris, or overgrown plants
  3. Reset the boiler to see if the fault clears

Parts commonly replaced

  • Outdoor weather compensation sensor
  • External sensor wiring

Related codes

4.9

Your boiler has lost its ability to measure the temperature of the water coming back from your radiators, often resulting in the system shutting down for safety.

High Engineer only £120-£210

Parts commonly replaced

  • Return Thermistor (NTC Sensor)
  • Connecting Wiring Harness

Related codes

4.10

Your boiler has stopped working because the fan that safely removes exhaust gases isn't running at the correct speed.

High Engineer only £280-450

Parts commonly replaced

  • Extraction Fan
  • Main PCB
  • Wiring Loom
4.11

Your boiler has detected that there is not enough water in the system to operate safely, causing it to shut down to prevent damage.

High DIY-safe £0-120

What to check first

  1. Locate the filling loop valves on the pipework underneath the boiler.
  2. Slowly open the valves until you hear water entering the system.
  3. Watch the pressure gauge and close the valves once the needle reaches between 1.0 and 1.5 bar.

Parts commonly replaced

  • Filling loop
  • Expansion vessel
  • Pressure sensor

Related codes

4.12

Your boiler has stopped working because it cannot detect water moving through the system to keep it from overheating.

High DIY-safe £100-£350

What to check first

  1. Check if the pressure gauge is below 1 bar and top it up using the filling loop
  2. Ensure all radiator valves and boiler isolation valves are fully open
  3. Check for any visible leaks around your radiators or the boiler itself
  4. Restart the boiler once the pressure is correct

Parts commonly replaced

  • Circulating Pump
  • Water Pressure Sensor
  • Flow Thermistor

Related codes

4.13

Your boiler's internal computer parts are failing to talk to each other, meaning the system cannot receive the instructions it needs to start up.

High Engineer only £250-£550

Parts commonly replaced

  • Main PCB
  • Wiring Harness
  • Display PCB

Related codes

Showing 11–20 of 36
4.14

Your boiler is providing hot water to your taps correctly, but there is a communication or mechanical fault preventing it from heating your radiators.

Medium Engineer only £120-£350

Parts commonly replaced

  • Diverter Valve Motor
  • Diverter Valve Cartridge
  • External Programmer

Related codes

4.15

Your boiler is providing central heating as normal, but it has stopped producing hot water when you turn on your taps.

Medium Engineer only £180-350

Parts commonly replaced

  • Diverter Valve Motor
  • Diverter Valve Cartridge
  • DHW Plate Heat Exchanger
4.16

Your boiler has lost power or the screen has stopped working, meaning you cannot see the status of your heating and hot water.

High DIY-safe £100-£450

What to check first

  1. Check if your home's main electrical consumer unit has a tripped circuit breaker
  2. Ensure the boiler's power switch or fused spur on the wall is turned on
  3. Check if any other appliances in the house have lost power

Parts commonly replaced

  • Display PCB
  • Main Control PCB
  • Internal Fuse
BLANK DISPLAY

Your boiler has no power or the control screen has failed, meaning the heating and hot water will not work until electricity is restored to the unit.

High DIY-safe £100-350

What to check first

  1. Check if other appliances in the house are working to rule out a general power cut.
  2. Inspect your main fuse box/consumer unit to see if the heating circuit tripper switch has flipped to 'OFF'.
  3. Check the fused spur switch (usually a red neon light switch near the boiler) to ensure it is turned on and the fuse hasn't blown.

Parts commonly replaced

  • Internal Fuse
  • Main Printed Circuit Board (PCB)
  • Display User Interface (UI) Board
FAN FAULT

Your boiler has detected a problem with its internal fan and has shut down as a safety precaution, meaning you will not have any heating or hot water.

High Engineer only £250-£450

Parts commonly replaced

  • Fan assembly
  • Printed Circuit Board (PCB)
  • Wiring harness
FLAME LOSS

Your boiler has successfully ignited but cannot keep the flame lit, causing it to shut down for safety.

High Engineer only £120-250

Parts commonly replaced

  • Ignition Lead
  • Spark Electrode
  • Gas Valve
  • Flame Rectification Probe
FLAME ON BEFORE GV ON

Your boiler has detected a flame inside the unit when the gas supply should be turned off, which is a safety lockout to prevent dangerous operation.

Emergency Engineer only £150-300

Parts commonly replaced

  • Gas Valve
  • Printed Circuit Board (PCB)
  • Flame Detection Electrode
FLOW THERMISTOR FAULT

Your boiler has lost the ability to read the temperature of the water flowing through it, so it has safely shut down to prevent overheating.

High Engineer only £120-180

Parts commonly replaced

  • Flow NTC Thermistor
  • Wiring Harness
FLOW/RETURN REVERSED

Your boiler has detected that the water pipes supplying heat to your home have been connected the wrong way around or a temperature sensor has been installed in the wrong location.

High Engineer only £120-250

Parts commonly replaced

  • Flow/Return thermistor
  • Wiring harness
FLOW/RETURN THERMISTOR FAULT

Your boiler has lost the ability to accurately measure the temperature of the water circulating inside it, so it has purposefully shut down to prevent damage.

High Engineer only £150-250

Parts commonly replaced

  • Flow thermistor
  • Return thermistor
  • Wiring harness
Showing 21–30 of 36
IGNITION LOCKOUT

Your boiler has failed to start after several attempts, so it has safely shut itself down to prevent a gas buildup.

High Engineer only £150-300

Parts commonly replaced

  • Ignition electrode
  • Gas valve
  • Ignition lead
LOW MAINS VOLTAGE

Your boiler is receiving less electricity than it needs to run safely, likely due to a problem with your home's power supply or a loose electrical connection.

High Engineer only £120-250

Parts commonly replaced

  • Electrical fuse spur
  • PCB (Printed Circuit Board)
  • Wiring harness
LOW WATER PRESSURE

Your boiler has lost the correct amount of water inside the system, which is preventing it from heating your home safely.

High DIY-safe £0-£120

What to check first

  1. Locate the external filling loop, which is a silver braided hose connected between two valves underneath the boiler.
  2. Open the valves slowly to allow mains water to enter the system until the pressure gauge reads between 1.0 and 1.5 bar.
  3. Close both valves firmly to stop the water flow and ensure the boiler resets its status.

Parts commonly replaced

  • Filling loop
  • Pressure relief valve
  • Pressure sensor
NO CONNECTION TO PRIMARY PCB

Your boiler's computer is unable to communicate with its main control unit, which has caused the system to stop working as a safety precaution.

High Engineer only £250-450

Parts commonly replaced

  • Primary PCB
  • Wiring harness
NO DHW BUT CH OK

Your boiler is heating your home correctly, but hot water is not being produced, likely due to a faulty diverter valve or sensor issue.

High Engineer only £150-300

Parts commonly replaced

  • Diverter valve
  • Domestic hot water sensor
  • Flow switch
NO WATER FLOW FAULT

Your boiler has stopped working because it cannot detect enough water moving through the system to heat your home or water safely.

High Engineer only £150-£300

Parts commonly replaced

  • Flow Turbine
  • Diverter Valve
  • Central Heating Pump
OUTSIDE SENSOR FAULT

Your boiler has lost communication with the weather sensor installed outside your home, so it is reverting to standard internal operating settings.

Low Engineer only £120-180

Parts commonly replaced

  • Outside Temperature Sensor
OVERHEAT LOCKOUT

Your boiler has detected that it is getting dangerously hot and has automatically shut down to prevent internal damage.

High Engineer only £120-250

Parts commonly replaced

  • Pump
  • System filter
  • Heat exchanger
  • NTC sensor
PCB FAULT

Your boiler's main internal computer has developed a critical software or hardware failure and can no longer control the heating or hot water safely.

High Engineer only £350-£550

Parts commonly replaced

  • Main Printed Circuit Board (PCB)
  • Wiring harness
PUMP LOW VOLTAGE FAULT

Your boiler has detected that the water pump responsible for circulating heat is not receiving the correct power, causing the system to stop working.

High Engineer only £150-300

Parts commonly replaced

  • Circulation Pump
  • Printed Circuit Board (PCB)
  • Wiring Harness
Showing 31–36 of 36
PUMP ROTOR BLOCKED

The pump responsible for pushing hot water to your radiators and taps has stopped spinning, likely due to a buildup of debris or sludge.

High Engineer only £120-250

Parts commonly replaced

  • Circulation Pump
  • Pump Head
RETURN THERMISTOR FAULT

Your boiler is struggling to accurately measure the temperature of the water returning to it, which prevents it from heating your home reliably.

High Engineer only £120-220

Parts commonly replaced

  • Return thermistor sensor
  • Wiring harness
THERMAL FUSE LOCKOUT

Your boiler has detected an extreme internal temperature and has shut down as a safety precaution to prevent damage or fire risk.

Emergency Engineer only £180-350

Parts commonly replaced

  • Thermal fuse
  • Heat exchanger
  • Overheat thermostat
THERMISTOR FAULT

Your boiler's temperature sensors are giving conflicting or incorrect readings, causing the system to stop heating for safety reasons.

High Engineer only £120-220

Parts commonly replaced

  • Flow thermistor
  • Return thermistor
TOO MANY RESETS

Your boiler has attempted to restart itself too many times in a short period and has now locked itself out for safety reasons.

High Engineer only £120-250

Parts commonly replaced

  • Ignition lead
  • Ignition electrode
  • Gas valve
  • PCB
TOO MANY RESTARTS

Your boiler has attempted to restart itself too many times in a short period and has now locked itself for safety to prevent damage.

High Engineer only £120-250

Parts commonly replaced

  • Ignition lead
  • Spark generator
  • PCB
  • Flame rectification probe

2 operating states & engineer diagnostics

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

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