How much does it cost to fix Atag error code FILL (continuous)?

Typical repair cost for the Atag FILL (continuous) fault is £80-120 including labour.

FILL (continuous) High

Atag FILL (continuous) Fault Code

Q: What does the Atag FILL (continuous) fault code mean?

Your boiler has stopped working because the water pressure inside the system has dropped too low and needs to be topped up.

Q: Can I fix Atag fault code FILL (continuous) myself?

Locate the external filling loop, which is a small silver braided hose connecting two pipes near your boiler.

Also written as FILLCONTINUOUS — same fault.

The Atag FILL (continuous) fault code means: your boiler has stopped working because the water pressure inside the system has dropped too low and needs to be topped up.. It appears on 2 Atag models in our database.

Technical description: Water pressure is to low (<0,7 bar), FILL indication remains continuously visible, the boiler is taken out of operation. The installation needs to be topped up.

Typical repair cost £80-120 (including labour)

DIY fix possible

Locate the external filling loop, which is a small silver braided hose connecting two pipes near your boiler.Open the valves at both ends of the hose to allow mains water to enter the system until the pressure gauge reads between 1.0 and 1.5 bar.Close both valves tightly to stop the flow of water and ensure the pressure gauge stays steady.

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Atag models that show the FILL (continuous) fault code

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

Source

Atag FILL (continuous) fault code information on this page is sourced and cross-checked against the official Atag service / installation manuals for each affected model.

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