BoilerFaultCodes.com

Glow-worm Swift Flow 100 Fault Codes

Combi Natural Gas 29.3 kW 1994-2002 Discontinued
GC Number: 47-319-06

Replaced by: Flexicom cx

This boiler uses LED flash patterns

Count the flashes in one repeating group before the pause. That number is your fault code. Do not reset until you have noted it. How to read fault codes →

Most common fault codes

Faulty CH thermistor
Your boiler's internal thermometer is broken, meaning it cannot accurately tell how hot the water is and has stopped working as a safety precaution.
Gas Safe engineer required · £90-160
Red 'Low Pressure' light (flashing)
Your boiler has stopped working because the water pressure inside the system has dropped too low to operate safely.
May be DIY safe · £0-160
Red Light
Your boiler has stopped working because there is not enough water pressure in the central heating system.
May be DIY safe · £0-120

All 13 fault codes

Code Severity Plain English
Faulty CH thermistor High Your boiler's internal thermometer is broken, meaning it cannot accurately tell how hot the water is and has stopped working as a safety precaution.
Green 'Running' light Low Your boiler is working normally and is currently heating up water for your taps or your radiators.
Green Light Low Your boiler is working normally and currently providing heating or hot water as requested.
Orange 'Mains' light Low Your boiler is receiving electrical power, but if the light is off, there may be a problem with the electricity supply or the internal circuit board.
Orange Light Low Your boiler is receiving electrical power and is currently switched on or ready to operate.
Red 'Low Pressure' light (flashing) High Your boiler has stopped working because the water pressure inside the system has dropped too low to operate safely.
Red Light High Your boiler has stopped working because there is not enough water pressure in the central heating system.
Red Light - LOW C.H. WATER PRESSURE High Your boiler has stopped working because the water pressure inside the heating system has dropped too low.
Red light (flashing) High Your boiler has encountered an internal error and needs a simple restart to try and clear the fault.
Red light flashes High Your boiler has entered a safety lockout mode and has stopped running to protect its internal components.
red lockout neon High Your boiler has stopped working for safety reasons and needs to be reset to try and fire up again.
Red lockout neon (lit) High Your boiler has shut itself down for safety because it either got too hot or failed to light the gas properly.
Red neon on the Reset Button High Your boiler has shut itself down because it detected it was getting too hot, likely due to a lack of water circulation or a blockage.

Glow-worm Swift Flow 100 is discontinued — time for a new one?

Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.

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