How much does it cost to fix Ideal error code Faulty primary circuit?

Typical repair cost for the Ideal Faulty primary circuit fault is £120-250 including labour.

Faulty primary circuit High

Ideal Faulty primary circuit Fault Code

Q: What does the Ideal Faulty primary circuit fault code mean?

Your boiler has detected that water is not circulating properly through your heating system, so it has safely shut down to prevent damage.

Also written as FAULTYPRIMARYCIRCUIT — same fault.

The Ideal Faulty primary circuit fault code means: your boiler has detected that water is not circulating properly through your heating system, so it has safely shut down to prevent damage.. It appears on 6 Ideal models in our database.

Technical description: Faulty primary circuit (no water or absence of flow)

Typical repair cost £120-250 (including labour)

DIY fix possible

Check your boiler display for the water pressure gauge reading; it should be between 1.0 and 1.5 barIf the pressure is below 1 bar, use the filling loop underneath the boiler to add water until it reaches 1.5 barTurn off the boiler at the wall, wait 30 seconds, and turn it back on to reset the system

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Ideal models that show the Faulty primary circuit fault code

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

Source

Ideal Faulty primary circuit fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.

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