How much does it cost to fix Grant error code LOW PRESSURE indicator lit?

Typical repair cost for the Grant LOW PRESSURE indicator lit fault is £0-£100 including labour.

LOW PRESSURE indicator lit High

Grant LOW PRESSURE indicator lit Fault Code

Q: What does the Grant LOW PRESSURE indicator lit fault code mean?

Your boiler has stopped working because the amount of water in your heating system is too low to run safely.

Also written as LOWPRESSUREINDICATORLIT — same fault.

The Grant LOW PRESSURE indicator lit fault code means: your boiler has stopped working because the amount of water in your heating system is too low to run safely.. It appears on 5 Grant models in our database.

Technical description: System water pressure has fallen to below 0.2 bar and the low pressure cut-out has been activated.

Typical repair cost £0-£100 (including labour)

DIY fix possible

Locate the external filling loop, which is a flexible silver hose connecting your cold water mains to your heating pipes.Open the valves at both ends of the filling loop slowly to let water into the system until the pressure gauge reads between 1.0 and 1.5 bar.Close both valves tightly to prevent over-pressurizing the system.

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Grant models that show the LOW PRESSURE indicator lit fault code

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

Source

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

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