Low Information
P1.0-2.9 bar on Potterton Powermax HE

Your boiler is displaying its current water pressure, which is within the normal operating range while the system is running.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

Normal pressure, system warm/hot

What causes this fault?

This is not actually a fault, but the boiler displaying that the internal water pressure is at a healthy level. As the water in your radiators heats up, it expands, causing the pressure reading to naturally rise toward the upper end of this range. It indicates that the system is functioning correctly and has the right amount of water to circulate heat around your home.

DIY fix possible

This fault may be fixable without an engineer. Check your manual first.

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