Potterton Gold HE Fault codes & diagnostics

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

Combi Natural Gas 24-33 kW 2005-2008 Discontinued
GC Numbers 47-590-0147-590-0547-590-0647-590-19

Replaced by: Gold Combi ErP

Download the Potterton Gold HE 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.
8 High 1 Medium

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
47-590-05 Gold 24 HE 2005–2008
47-590-06 Gold 28 HE 2005–2008
47-590-19 Gold 33 HE 2005–2008

All 9 documented codes

Tap any card for details

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

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

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

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

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
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

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

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

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