Brand > Type > Error code > 3F 273

Error code: 3F 273

CauseThe boiler has been switched off for a few seconds because the boiler has been in continuous operation for 24 hours.

This is a security check.

Installer Diagnosis

Completely switch off both the central heating heat demand and hot tap water and check after 1 minute whether the fan remains in operation.

Does the fan remain in operation?