Potterton Titanium Heat Fault codes & diagnostics

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

Heat Natural Gas 2017 onwards
GC Numbers 41-592-6141-592-6241-592-6341-592-6441-592-65
Download the Potterton Titanium Heat manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

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 →

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
41-592-61 Titanium 12 Heat 2017–present
41-592-62 Titanium 15 Heat 2017–present
41-592-63 Titanium 18 Heat 2017–present
41-592-64 Titanium 24 Heat 2017–present
41-592-65 Titanium 30 Heat 2017–present
Just want the most common Potterton Titanium Heat faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes

All 3 documented codes

Tap any card for details

1 green flash

Your boiler has detected that it is getting too hot and has paused operation to prevent damage.

High DIY-safe £100-£350

What to check first

  1. Check that all radiator valves are open to allow water to flow.
  2. Ensure there is enough water pressure in the system by checking the gauge.
  3. Turn the boiler off and back on at the main power switch to reset the sequence.

Parts commonly replaced

  • Circulation pump
  • Overheat thermostat
  • Thermistor (NTC sensor)

Related codes

Full explanation for 1 green flash
3 green flashes

Your boiler has lit correctly but the flame has unexpectedly gone out, which often means the system isn't getting enough fuel or the sensor can't tell the fire is lit.

High DIY-safe £120-300

What to check first

  1. Check if your gas supply is active by testing another gas appliance like a hob
  2. Ensure your gas meter has credit if you use a prepaid meter
  3. Switch the boiler off and on again using the main power switch to see if it resets

Parts commonly replaced

  • Flame Sensing Electrode
  • Gas Valve
  • Ignition Lead

Related codes

Full explanation for 3 green flashes
3 red flashes

Your boiler has failed to ignite after several attempts and has locked itself out for safety.

High DIY-safe £100-350

What to check first

  1. Check that your gas emergency control valve is in the 'on' position and you have credit on your meter.
  2. Ensure other gas appliances in your home, such as a hob, are working correctly.
  3. Turn the selector switch to the 'Reset' position for five seconds and then back to the 'Run' position.

Parts commonly replaced

  • Ignition Electrode
  • Gas Valve
  • PCB
  • Flame Sensing Lead

Related codes

Full explanation for 3 red flashes
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