Potterton Assure 16 Heat Fault codes & diagnostics

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

Natural Gas 2017-present
GC Number 41-592-67
Download the Potterton Assure 16 Heat manualThe official installation and service manual (PDF). 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 →

Fault codes

All 1 documented codes

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1 flash

Your boiler has temporarily stopped working because it has detected an issue with either its operating temperature or one of its internal sensors.

High Engineer only £150-300

Parts commonly replaced

  • NTC Thermistor
  • Temperature Sensor
  • PCB

Related codes

Full explanation for 1 flash
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