P1.6 Low

Gledhill P1.6 Fault Code

Also written as P16 — same fault.

The Gledhill P1.6 fault code means: your boiler is notifying you that the water pressure in the system is currently at 1.6 bar, which is within the normal operating range.. It appears on 1 Gledhill 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: System pressure (example value shown on display digits 1 – 4)
Typical repair cost £0 (including labour)

DIY fix possible

Check that the pressure remains between 1.0 and 2.0 bar when the system is cold.No action is required if the boiler is functioning normally.If the pressure drops below 1.0 bar, use the filling loop to top it up.

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Gledhill models that show the P1.6 fault code

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

Source

Gledhill P1.6 fault code information on this page is sourced and cross-checked against the official Gledhill service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026