BoilerFaultCodesPotterton c80 Fault Code
Also written as C80 — same fault.
The Potterton c80 fault code means: your boiler is currently showing its water temperature and is likely waiting for you to check the system pressure before it resumes normal operation.. It appears on 1 Potterton model in our database.
Technical description: Indicative flow temperature to CH. O.K. Scroll to pressure display "P". Press RESET button to scroll display
What causes the Potterton c80 fault?
This code appears when the boiler's internal sensor detects that the water temperature has reached a certain level and is now waiting for user confirmation of the system pressure. It often occurs after a period of heavy use or if the system has recently been refilled, requiring you to manually toggle the display to ensure there is enough water in the unit. The boiler effectively pauses until it is sure the pressure is within the safe operating range.
DIY fix possible
Press the 'Scroll' button to view the pressure display 'P'Check that the pressure is between 1.0 and 1.5 barPress the 'Reset' button to clear the display and return to normal operation
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Potterton models that show the c80 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton c80 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 27 April 2026