Low
P x.x on Atag Q 30CR

Your boiler is simply displaying the current water pressure reading, which is a normal status update rather than a fault.

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.

What the manual says

Manufacturer manual

Water pressure in bar.

From this model's manual
Verified against the Atag Q 30cr installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Check the display periodically to ensure the pressure stays between 1.0 and 1.5 barIf the pressure is below 1.0 bar, use the filling loop to top it upIf the pressure is above 2.0 bar, bleed a radiator to release air and lower the pressure

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