BoilerFaultCodesPotterton Pulse Red (2 flashes) Fault Code
Also written as PULSERED2FLASHES — same fault.
The Potterton Pulse Red (2 flashes) fault code means: your boiler has detected that it is running too hot and has automatically shut itself down to prevent damage.. It appears on 2 Potterton models in our database.
Technical description: Continuous - Case Temperature Sensor Fault/Overheat
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Potterton models that show the Pulse Red (2 flashes) fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton Pulse Red (2 flashes) fault code information on this page is sourced and cross-checked against the official Potterton service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026