How much does it cost to fix Ariston error code 501?

Typical repair cost for the Ariston 501 fault is £90-250 including labour.

501 High

Ariston 501 Fault Code

Q: What does the Ariston 501 fault code mean?

Your boiler has failed to light the flame, which means you will not have any heating or hot water until the issue is resolved.

The Ariston 501 fault code means: your boiler has failed to light the flame, which means you will not have any heating or hot water until the issue is resolved.. It appears on 1 Ariston model in our database.

Technical description: All Boilers

Typical repair cost £90-250 (including labour)

DIY fix possible

Check if other gas appliances, like a hob, are working to ensure gas is reaching the property.Inspect the white plastic condensate pipe outside; if it is frozen, gently thaw it with warm water.Press the 'Reset' button on the front panel to attempt to restart the ignition sequence.

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Ariston models that show the 501 fault code

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

Alteas One Repair: £90-250

Source

Ariston 501 fault code information on this page is sourced and cross-checked against the official Ariston service / installation manuals for each affected model.

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