How much does it cost to fix Johnson Starley error code LOW WATER PRESSURE?

Typical repair cost for the Johnson Starley LOW WATER PRESSURE fault is £0-120 including labour.

LOW WATER PRESSURE High

Johnson Starley LOW WATER PRESSURE Fault Code

Q: What does the Johnson Starley LOW WATER PRESSURE fault code mean?

Your boiler has detected that there is not enough water in the system to operate safely and effectively, causing it to shut down.

Also written as LOWWATERPRESSURE — same fault.

The Johnson Starley LOW WATER PRESSURE fault code means: your boiler has detected that there is not enough water in the system to operate safely and effectively, causing it to shut down.. It appears on 1 Johnson Starley model in our database.

Technical description: Low water pressure

Typical repair cost £0-120 (including labour)

DIY fix possible

Locate the silver filling loop (braided hose) usually found underneath or near the boiler.Slowly open the one or two valves on the hose until you hear water entering the system.Watch the pressure gauge and close the valves tightly once the needle reaches between 1.0 and 1.5 bar.

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Johnson Starley models that show the LOW WATER PRESSURE fault code

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

J32 System ET Repair: £0-120

Source

Johnson Starley LOW WATER PRESSURE fault code information on this page is sourced and cross-checked against the official Johnson Starley service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026