How much does it cost to fix Potterton error code Low System Pressure light?

Typical repair cost for the Potterton Low System Pressure light fault is £80-150 including labour.

Low System Pressure light High

Potterton Low System Pressure light Fault Code

Q: What does the Potterton Low System Pressure light fault code mean?

Your boiler has lost the water pressure it needs to circulate heat, so it has safely shut itself down until the system is topped back up.

Also written as LOWSYSTEMPRESSURELIGHT — same fault.

The Potterton Low System Pressure light fault code means: your boiler has lost the water pressure it needs to circulate heat, so it has safely shut itself down until the system is topped back up.. It appears on 2 Potterton models in our database.

Technical description: The central heating system looses pressure for any reason and the appliance will cease to function.

Typical repair cost £80-150 (including labour)

DIY fix possible

Locate the filling loop (a silver flexi-hose) beneath the boiler.Open the valves on the filling loop to allow water into the system until the pressure gauge reads between 1 and 1.5 bar.Close the valves tightly and turn the boiler off and on again to reset.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Potterton models that show the Low System Pressure light fault code

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

Source

Potterton Low System Pressure light 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