What does the Heatline S.02 fault code mean?

Your boiler is simply preparing the internal pump to move water around before it ignites, which is a normal part of the starting process.

How much does it cost to fix Heatline error code S.02?

Typical repair cost for the Heatline S.02 fault is £0 including labour.

Manufacturer manual

Pre-run pump

From this model's manual

Verified against the Heatline Caprizplus 24a installation & service manual, page 26.

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

Boiler cover options

A cover plan would handle faults like S.02: no call-out fees, no surprise bills.

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Each noise points to a different fault.

Break-even maths on monthly cover.

7 signs repair isn't worth it anymore.