High
87 on Keston 30C

Your boiler has detected an issue with the air supply system and has safely shut itself down to prevent damage.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

What the manual says

Manufacturer manual

FAN FAULT - CONTACT INSTALLER

From this model's manual
Verified against the Keston/Keston 30c installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

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All 31 fault codes on the 30C

Seeing a different code? Every code this model can display, in one place.

8182838485868889909192939495BCC FaultFalse Flame LockoutFan FaultFlame LossFlow Temperature Overheat LockoutFlow Thermistor FaultIgnition LockoutLow mains voltageLow water pressureNo water flow lockoutOutside sensor faultOverheat lockoutPCB FaultReset the boilerReturn Thermistor FaultToo many resets

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