High
OFF on Grant Vortex Eco

Your boiler has lost all power and is completely shut down, meaning it cannot provide any heating or hot water until the electrical supply is restored.

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

Lack of electrical supply. Check presence of voltage in the L - N of the four pin plug. Check the conditions of the fuses. Check that safety thermostat is not in lockout.

From this model's manual
Verified against the Grant/Grant Vortex Eco 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 77 fault codes on the Vortex Eco

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

10121821.02226.0313636.04454616992116143198232286348396429594727728729A1.2A1.3A2.2A3.2Blinking REDBURNER indicator flashingBURNER indicator Slow flashBurner lock-outBURNER Slow flashCH PUMP Fast flashCH PUMP indicator Fast flashCH PUMP indicator Slow flashCH PUMP Slow flashConstant REDDHW PUMP (FLASHING)DHW PUMP Fast flashDHW PUMP indicator Fast flashDHW PUMP indicator FLASHINGDHW PUMP indicator Slow flashDHW PUMP Slow flashFast flashFlashes redFlashes red/greenGREENGREEN blinkingGREEN blinking (0.5s)GREEN ORANGE blinking (0.5s)GREEN, RED blinkingGreen/Red flashingLED offLock-outLock-out (light on)LockoutLockout button litLOW PRESSURELOW PRESSURE indicator litORANGEORANGE blinkingOverheatOverheat thermostatREDRED blinkingRED blinking (0.5s)RED fast blinkingRED fast blinking (0.2s)RED flashing (Reset button)RED steady ONRED, GREEN blinking invertedRED, ORANGE blinking invertedSlow flash

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