How much does it cost to fix boiler error code 70 ❍, red ●?

Typical repair cost for the boiler 70 ❍, red ● fault is £120-250 including labour.

70 ❍, red ● High

Boiler Fault Code 70 ❍, red ●

Also written as 70RED — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 70 ❍, red ● appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has stopped because it failed to keep the burner flame lit during operation. (As reported on Ariston Clas One)

Pick your boiler brand for the 70 ❍, red ● fix

Ariston 70 ❍, red ● 1 model

Source

Information for the 70 ❍, red ● fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

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