Potterton Gold HE Fault codes & diagnostics

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

Combi Natural Gas 24-33 kW 2008-2013 Discontinued
GC Numbers 47-590-0147-590-0247-590-03

Replaced by: Gold Combi ErP

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Severity at a glance

Each cell = one fault code. Hover to identify.
15 High 1 Medium
Just want the most common Potterton Gold HE faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes

All 16 documented codes

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E01

Your boiler has failed to light, which means you will not have any heating or hot water until the issue is resolved.

High DIY-safe £100-£280

What to check first

  1. Check that your gas meter has credit and the gas emergency control valve is open.
  2. Verify that other gas appliances in your home, such as a hob, are working.
  3. Press and hold the 'R' (Reset) button for at least 2 seconds to see if the boiler restarts.

Parts commonly replaced

  • Ignition Electrode
  • Spark Generator
  • Gas Valve

Related codes

Full explanation for E01
E02

Your boiler has got too hot and has automatically shut down to prevent damage to the internal components.

High DIY-safe £100-£250

What to check first

  1. Wait at least 20 minutes for the boiler to cool down completely.
  2. Check that your radiator valves are open and not blocked by furniture.
  3. Select the 'Reset' position on the control knob for five seconds to restart the system.

Parts commonly replaced

  • Overheat thermostat
  • Circulating pump
  • Heat exchanger (if scaled up)

Related codes

Full explanation for E02
E03

Your boiler's fan has stopped working, which means it cannot safely blow exhaust gases out of the flue and has shut down as a safety precaution.

High Engineer only £200-£450

Parts commonly replaced

  • Fan assembly
  • Printed Circuit Board (PCB)
  • Fan wiring harness

Related codes

Full explanation for E03
E05

Your boiler's internal temperature sensors are sending incorrect signals, preventing the system from heating your water or radiators safely.

High Engineer only £100-£180

Parts commonly replaced

  • Central Heating (CH) thermistor
  • Domestic Hot Water (DHW) thermistor
  • Sensor wiring harness

Related codes

Full explanation for E05
E06

Your boiler has detected a problem with one of its internal temperature sensors, which means it cannot safely monitor how hot the water or exhaust gases are getting.

High Engineer only £100-£180

Parts commonly replaced

  • Central Heating (CH) NTC sensor
  • Flue NTC sensor
  • Wiring harness

Related codes

Full explanation for E06
E10

Your boiler has stopped working because the water pressure in the central heating system is too low.

High DIY-safe £0 - £160

What to check first

  1. Locate the filling loop (usually a silver flexible hose) underneath or near the boiler.
  2. Open the black taps on the filling loop slowly until you hear water flowing.
  3. Close both taps tightly once the pressure gauge on the boiler reaches between 1.0 and 1.5 bar.

Parts commonly replaced

  • Water pressure switch
  • Expansion vessel (recharge or replacement)
  • Filling loop valve

Related codes

Full explanation for E10
E20

Your boiler's internal temperature sensor has stopped sending a reliable signal, which means the system cannot safely monitor how hot the water is for your radiators.

High Engineer only £90-160

Parts commonly replaced

  • Central Heating NTC thermistor
  • Wiring harness
  • Main PCB

Related codes

Full explanation for E20
E28

Your boiler's internal sensor that monitors exhaust gases has developed a fault, causing the system to shut down for safety.

High Engineer only £100-180

Parts commonly replaced

  • Flue NTC Sensor
  • Sensor Wiring Harness

Related codes

Full explanation for E28
E50

Your boiler's hot water temperature sensor has developed a fault, meaning the system cannot accurately measure or provide hot water.

Medium Engineer only £90-160

Parts commonly replaced

  • Domestic Hot Water (DHW) NTC thermistor
  • Connecting wiring harness

Related codes

Full explanation for E50
E110

Your boiler has shut down because it has detected it is getting too hot, usually caused by a circulation problem or a blockage.

High DIY-safe £100-£350

What to check first

  1. Check that your radiator valves are open
  2. Ensure there is enough water pressure in the system (usually between 1 and 1.5 bar)
  3. Wait for the boiler to cool down and try pressing the reset button

Parts commonly replaced

  • Overheat Thermostat
  • Circulating Pump
  • Main Heat Exchanger (if blocked)

Related codes

Full explanation for E110
E119

Your boiler has stopped working because the water pressure is too low and needs to be topped 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 one or two taps/valves until you hear water entering the system.
  3. Watch the pressure gauge and close the taps once the needle reaches between 1 and 1.5 bar.

Parts commonly replaced

  • Filling loop
  • Water pressure switch
  • Expansion vessel
Full explanation for E119
E125

Your boiler is struggling to move water around the system effectively, which is causing it to shut down to prevent overheating.

High DIY-safe £180-350

What to check first

  1. Check that your radiator valves are fully open
  2. Ensure your boiler pressure is between 1.0 and 1.5 bar on the gauge
  3. Gently bleed your radiators to remove any trapped air pockets

Parts commonly replaced

  • Circulating Pump
  • Diverter Valve
  • Flow Temperature Sensor

Related codes

Full explanation for E125
E130

Your boiler has sensed that the exhaust gases are getting too hot and has shut down as a safety precaution to prevent damage.

High Engineer only £120-£250

Parts commonly replaced

  • Flue NTC Sensor
  • Main Heat Exchanger (cleaning or replacement)
  • Burner Insulation

Related codes

Full explanation for E130
E133

Your boiler has failed to light because it either cannot get enough gas or it cannot detect the flame it has sparked.

High DIY-safe £100-£350

What to check first

  1. Check that your gas stopcock is fully open and your gas meter has credit.
  2. Try turning on another gas appliance, like a hob, to see if the gas supply is active.
  3. Press the 'Reset' button on the front of the boiler for five seconds.

Parts commonly replaced

  • Gas Valve
  • Ignition Lead
  • Spark Electrode
  • Printed Circuit Board (PCB)

Related codes

Full explanation for E133
E160

Your boiler has detected an issue with the fan that clears exhaust gases, preventing it from starting up for safety reasons.

High Engineer only £250-£450

Parts commonly replaced

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

Related codes

Full explanation for E160
E193

Your boiler has detected that water is not circulating properly through the system before the burner starts up.

High DIY-safe £120-£350

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 isolation valves under the boiler are fully open
  3. Try bleeding your radiators to remove any trapped air pockets

Parts commonly replaced

  • Circulation Pump
  • Flow Temperature Sensor
  • Main Heat Exchanger (if blocked)

Related codes

Full explanation for E193