High
All lights: OFF on Potterton Prima 30B

Your boiler has lost all power and is completely shut down, meaning it is not receiving any electricity.

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

Mains supply OFF or fuse on Electronic Control failed

From this model's manual
Verified against the Potterton Boiler Suprima 50 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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All 19 fault codes on the Prima 30B

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

Flashing Red LEDGreen LED OFF, Red LED ONGreen LED ON, Red LED OFFGreen light 'On' onlyGreen light flashes rapidlyGreen light On onlyLockout (LED Mode)Lockout (rapid flashing)Overheat - Red LED: FLASHINGRED & GREEN lights flashingRED & GREEN lights OFFRed LED flashingRED LED on continuouslyRed LED on onlyRed LED rapid flashingRed LED: Flashing RedRed LED: Rapid FlashingRed light flashing (Lockout)

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