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

Typical repair cost for the Potterton Low Water Pressure fault is £80-120 including labour.

Low Water Pressure High

Potterton Low Water Pressure Fault Code

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

Your boiler has stopped working because the amount of water inside the system has dropped too low, which is a common issue that often just needs a quick top-up.

Also written as LOWWATERPRESSURE — same fault.

The Potterton Low Water Pressure fault code means: your boiler has stopped working because the amount of water inside the system has dropped too low, which is a common issue that often just needs a quick top-up.. It appears on 2 Potterton models in our database.

Technical description: The neon indicator shows low water pressure (1 bar) fuel failure/fault.

Typical repair cost £80-120 (including labour)

DIY fix possible

Locate the external filling loop, which is usually a silver flexible hose connected between two pipes under the boiler.Open the valves at both ends of the hose to allow water into the system until the pressure gauge reads between 1.0 and 1.5 bar.Close both valves tightly and remove the hose if required by your specific installation style.

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Potterton models that show the Low Water Pressure fault code

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

Source

Potterton Low Water Pressure 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