Potterton Performa 24i HE Fault codes & diagnostics

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

Combi Natural Gas 24 kW 2004-2008 Discontinued
GC Number 47-393-12

Replaced by: Potterton Titanium

Download the Potterton Performa 24i HE manualThe official installation and service manual (PDF), the document these fault codes were read from. PDF

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Severity at a glance

Each cell = one fault code. Hover to identify.
5 Emergency 13 High
Versions & GC numbers

Which version do you have?

The GC number on your boiler's data badge identifies the exact appliance and production years, as recorded in the UK Product Characteristics Database.

GC number Appliance (register name) Produced
47-393-12 Performa 24i HE 2004–2008

Appliance names and production years are taken from the UK Product Characteristics Database (the SAP/SEDBUK register). Where a GC number is also printed in this model's own manufacturer manual, both sources were checked to agree.

Just want the most common Potterton Performa 24i HE faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes

All 18 documented codes

Tap any card for details

6

Your boiler has stopped because it cannot safely ignite, or the internal pipe carrying waste water is blocked.

High DIY-safe £90-250

What to check first

  1. Check if your gas supply is working by testing another gas appliance like a hob.
  2. Locate the external plastic condensate pipe outside your home and check if it is frozen or blocked.
  3. Press the reset button on your boiler for up to 5 seconds to see if it restarts.

Parts commonly replaced

  • Condensate trap
  • Ignition electrode
  • Gas valve
  • PCB

Related codes

Full explanation for 6
7

Your boiler has automatically shut down because an internal safety device detected that either the boiler or the flue has become dangerously hot.

Emergency Engineer only £150-300

Parts commonly replaced

  • Safety thermostat
  • PCB
  • Heat exchanger

Related codes

Full explanation for 7
8

Your boiler has detected an issue with the internal fan or the flue that removes harmful gases, so it has safely shut down to prevent any risk.

Emergency Engineer only £150-£350

Parts commonly replaced

  • Fan assembly
  • Air pressure switch
  • Printed Circuit Board (PCB)

Related codes

Full explanation for 8
9

Your boiler has stopped working because the water pressure inside the system is too low or the internal water pump is not running correctly.

High DIY-safe £150-300

What to check first

  1. Locate the filling loop underneath your boiler.
  2. Open the valves gently to let water in until the pressure gauge on the front reads between 1 and 1.5 bar.
  3. Close the valves tightly and check the boiler display or reset the unit.

Parts commonly replaced

  • Central Heating Pump
  • Pressure Relief Valve
  • Automatic Air Vent

Related codes

Full explanation for 9
10

Your boiler has stopped providing hot water because it is having trouble reading the temperature of the water inside the unit.

High Engineer only £120-220

Parts commonly replaced

  • Domestic Hot Water (DHW) NTC Thermistor
  • Wiring harness
Full explanation for 10
11

Your boiler has stopped heating because it is struggling to accurately measure the temperature of the water circulating to your radiators.

High Engineer only £120-220

Parts commonly replaced

  • Central Heating NTC Sensor
  • Wiring Harness

Related codes

Full explanation for 11
24

Your boiler has stopped working because it cannot light its burner properly, which is often caused by a blockage in the pipe that drains away waste water.

High Engineer only £120-250

Parts commonly replaced

  • Condensate trap
  • Ignition electrode
  • Gas valve

Related codes

Full explanation for 24
25

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

High Engineer only £150-300

Parts commonly replaced

  • Safety limit thermostat
  • Central heating pump
  • Diverter valve
  • Primary heat exchanger
Full explanation for 25
26

Your boiler is currently unable to safely remove waste gases, so it has shut itself down to prevent any risk to your home.

High Engineer only £150-350

Parts commonly replaced

  • Fan unit
  • Flue pressure switch
  • Printed Circuit Board (PCB)

Related codes

Full explanation for 26
27

Your boiler has detected that water is either not moving around the system correctly or that the pressure of the water inside the unit is too low to run safely.

High DIY-safe £120-250

What to check first

  1. Locate the pressure gauge on the front of your boiler.
  2. Check if the needle is below the 1 bar mark.
  3. Use the filling loop (a metal braided hose or key under the boiler) to slightly open the valves and top up the system until the needle reaches 1.5 bar.

Parts commonly replaced

  • Central heating pump
  • Pressure relief valve
  • Pressure sensor

Related codes

Full explanation for 27
28

Your boiler has detected an issue with the sensor that monitors the temperature of the exhaust gases, causing it to stop working for your safety.

High Engineer only £120-220

Parts commonly replaced

  • Flue NTC Sensor
  • Wiring harness

Related codes

Full explanation for 28
29

Your boiler has stopped working because it is unable to accurately measure the temperature of the water used for your radiators.

High Engineer only £120-220

Parts commonly replaced

  • Central Heating NTC Thermistor
  • Wiring Harness

Related codes

Full explanation for 29
Air Flow Monitor

Your boiler is struggling to breathe because the flue vent outside is blocked or the internal fan isn't pushing air correctly.

Emergency Engineer only £150-300

Parts commonly replaced

  • Flue fan
  • Air pressure switch
  • Venturi tube

Related codes

Full explanation for Air Flow Monitor
Flame Failure

Your boiler is struggling to start because it cannot successfully ignite the gas flame or keep it running reliably.

Emergency Engineer only £150-300

Parts commonly replaced

  • Ignition electrode
  • Gas valve
  • Condensate trap
  • Printed Circuit Board (PCB)

Related codes

Full explanation for Flame Failure
Pump Fault or Low Pressure

Your boiler has stopped working because the water pressure inside the system is too low or the internal water pump has failed to move heat around your home.

High DIY-safe £150-350

What to check first

  1. Check your boiler's pressure gauge; if it is below 1 bar, top it up using the filling loop
  2. Once the pressure is between 1 and 1.5 bar, switch the boiler off and back on at the mains to reset it
  3. If the pressure was normal, turn the heating thermostat up to check if the pump hums

Parts commonly replaced

  • Central heating pump
  • Pressure relief valve
  • Pressure sensor

Related codes

Full explanation for Pump Fault or Low Pressure
Safety Thermostat

Your boiler has detected that it is getting too hot and has automatically switched itself off to prevent any damage or safety hazards.

High Engineer only £120-250

Parts commonly replaced

  • Pump
  • Diverter valve
  • Primary heat exchanger
  • System filter

Related codes

Full explanation for Safety Thermostat
Sensor Fault

Your boiler is struggling to accurately detect the temperature of the water, which is preventing it from heating your home or water reliably.

High Engineer only £120-180

Parts commonly replaced

  • NTC Thermistor
  • Temperature sensor

Related codes

Full explanation for Sensor Fault
System Pressure (3 bar or greater)

Your boiler's internal water pressure has climbed too high, which has triggered a safety measure to protect the system from damage.

Emergency Engineer only £100-250

Parts commonly replaced

  • Pressure Relief Valve (PRV)
  • Filling Loop
  • Expansion Vessel
Full explanation for System Pressure (3 bar or greater)