t80 Low

Potterton t80 Fault Code

Also written as T80 — same fault.

The Potterton t80 fault code means: your boiler is displaying a status message rather than a breakdown code, indicating it is checking water temperatures and simply requires a reset to return to the pressure display.. It appears on 1 Potterton model in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Indicative flow temperature to DHW. O.K. Scroll to pressure display "P". Press RESET button to scroll display

What causes the Potterton t80 fault?

This message appears when the boiler's internal computer is displaying the current water temperature being sent to your taps rather than the system pressure. It is not actually a fault, but rather a specific monitoring mode that occurred because a button was likely pressed or the system is performing a routine check. You simply need to toggle the display settings to return the screen to its standard pressure reading.

DIY fix possible

Locate the RESET button on the control panel.Press the RESET button once to scroll through the menu letters.Stop when the display shows 'P' (for Pressure) to 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 t80 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Potterton t80 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