Baxi Statesman Fault codes & diagnostics

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

Regular Oil Discontinued
No manual available yet We don't hold the official service manual for this model yet. We're sourcing it — check back soon.

This boiler uses LED flash patterns

Count the flashes in one repeating group before the pause. That number is your fault code. Do not reset until you have noted it. How to read fault codes →

Severity at a glance

Each cell = one fault code. Hover to identify.
6 High 4 Low
Just want the most common Baxi Statesman faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes

All 10 documented codes

Tap any card for details

1 red flash

Your boiler has detected that it is getting too hot or that water is not moving through the system correctly, causing it to shut down for safety.

High DIY-safe £120-280

What to check first

  1. Check that your system pressure is between 1 and 1.5 bar on the pressure gauge.
  2. Ensure all radiator valves and any isolation valves are fully open.
  3. Press the reset button on the control panel to see if the fault clears.

Parts commonly replaced

  • Temperature Sensor (NTC Thermistor)
  • Circulation Pump
  • Overheat Thermostat

Related codes

Full explanation for 1 red flash
2 red flashes

Your boiler has switched itself off because it got too hot, which is a safety measure to prevent damage to the system.

High DIY-safe £90-180

What to check first

  1. Wait for the boiler to cool down completely (at least 20-30 minutes).
  2. Ensure all radiator valves are open and there are no obstructions to water flow.
  3. Locate the manual reset button (typically under a small black cap on the control panel) and press it firmly.

Parts commonly replaced

  • Overheat Thermostat
  • Circulating Pump
  • Thermistor

Related codes

Full explanation for 2 red flashes
3 green flashes

Your boiler has lost its flame briefly and is trying to restart itself, which could indicate a temporary issue with your fuel supply or a dirty sensor.

Low DIY-safe £90-200

What to check first

  1. Check that you have enough oil in your storage tank
  2. Ensure the oil supply valve is fully open
  3. Wait for the boiler to complete its automatic reset process

Parts commonly replaced

  • Oil nozzle
  • Photocell (flame sensor)
  • Oil filter

Related codes

Full explanation for 3 green flashes
3 red flashes

Your boiler has tried to light several times but cannot start, usually because of an empty fuel tank or a blocked oil line.

High DIY-safe £120-280

What to check first

  1. Check your oil tank to ensure you haven't run out of fuel.
  2. Verify that the oil supply valve on your tank is fully open.
  3. Press the 'Reset' button on the burner control box once.

Parts commonly replaced

  • Oil nozzle
  • Photocell
  • Ignition electrodes
  • Oil pump

Related codes

Full explanation for 3 red flashes
4 green flashes

Your boiler is having a temporary 'conversation' issue between its internal electronics which should resolve itself automatically.

Low DIY-safe £0-120

What to check first

  1. Wait for the boiler to self-reset as this is often a temporary glitch
  2. Switch the boiler off at the fused spur switch for 30 seconds and turn it back on
  3. Ensure no external controls or thermostats are being adjusted rapidly

Parts commonly replaced

  • Printed Circuit Board (PCB)
  • Control Interface

Related codes

Full explanation for 4 green flashes
4 red flashes

Your boiler's internal safety system has detected that the fan, which clears exhaust gases, is not spinning correctly or has lost power.

High Engineer only £180-350

Parts commonly replaced

  • Fan assembly
  • Air pressure switch
  • PCB (Control Board)

Related codes

Full explanation for 4 red flashes
5 green flashes

Your boiler has experienced a brief internal memory glitch and is currently trying to restart itself.

Low DIY-safe £0-120

What to check first

  1. Wait for the boiler to automatically reset itself
  2. If the flashing continues for more than 10 minutes, turn the boiler power switch off and on again
  3. Monitor the boiler to ensure it returns to normal operation

Parts commonly replaced

  • None (Software reset)
  • Printed Circuit Board (PCB) if fault recurs

Related codes

Full explanation for 5 green flashes
5 red flashes

Your boiler's internal memory chip has developed a communication fault, meaning the control system can no longer read the settings it needs to operate safely.

High Engineer only £180-350

Parts commonly replaced

  • Parameter Storage Unit (PSU)
  • Main PCB (Printed Circuit Board)

Related codes

Full explanation for 5 red flashes
6 green flashes

Your boiler has encountered a minor temporary glitch and is currently trying to restart itself automatically.

Low DIY-safe £80-160

What to check first

  1. Wait up to 15 minutes for the boiler to complete its self-test and restart
  2. Ensure there is enough oil in your storage tank
  3. Press the reset button if the light continues to flash after a long wait

Parts commonly replaced

  • Control Box
  • Photocell
  • Oil Nozzle
Full explanation for 6 green flashes
6 red flashes

Your boiler has detected an internal communication error or a generic failure that is preventing it from running safely.

High Engineer only £150-£400

Parts commonly replaced

  • Main Control PCB
  • Ignition Lead
  • Internal Wiring Harness

Related codes

Full explanation for 6 red flashes
Status & diagnostic codes

1 operating states & engineer diagnostics

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

1 green flash Status Your boiler has reached the correct temperature and is simply taking a normal break from firing until the heat is needed again.