BoilerFaultCodes.com

Potterton Envoy 30 Fault Codes

Regular Natural Gas 8.8 kW 1994-1998 Discontinued
GC Number: 41-590-30

Replaced by: Suprima

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

2
Your boiler is getting too hot too quickly, often because there is trapped air in the system or the water isn't moving through the unit properly.
May be DIY safe · £100-250
6
Your boiler has stopped working because it cannot accurately measure the temperature of the water returning from your radiators.
Gas Safe engineer required · £90-160
7
Your boiler has detected a problem with an internal sensor that monitors the main casing, which has stopped it from running safely for now.
Gas Safe engineer required · £90-160

All 44 fault codes

Code Severity Plain English
0 Low Your boiler has power, but it is currently waiting for you to turn on your external thermostat or heating programmer.
1 Low Your boiler is working but it isn't heating the water to the usual temperature, which might make your home feel less warm than normal.
2 High Your boiler is getting too hot too quickly, often because there is trapped air in the system or the water isn't moving through the unit properly.
3 Low Your boiler has reached its required heat and is currently taking a normal break until the temperature drops again.
4 Low Your boiler is taking a short, five-minute break to protect itself from overworking and will restart automatically.
5 Low Your boiler is simply cooling itself down naturally after the burner has switched off to move leftover heat into your radiators.
6 High Your boiler has stopped working because it cannot accurately measure the temperature of the water returning from your radiators.
7 High Your boiler has detected a problem with an internal sensor that monitors the main casing, which has stopped it from running safely for now.
8 High Your boiler has detected that a safety sensor meant to prevent it from overheating without water has failed, which means the system cannot safely start up.
9 High Your boiler has stopped working because the internal fan, which safely clears waste gases, is spinning at the wrong speed.
9 (Flashing) High Your boiler has shut itself down for safety because it failed to light or detected an internal problem.
A High Your boiler is failing to light the burner and has shut itself down for safety after three unsuccessful attempts.
A01 High Your boiler has failed to light the gas after several attempts, which means your heating and hot water will not work until the system is reset.
A02 High Your boiler is failing to light the gas even though it is trying to start up.
A03 High Your boiler is failing to light the gas to create a flame, meaning you will not have any heating or hot water until it is reset or repaired.
b Low Your boiler is temporarily resting after the heating cycle to move leftover heat into your radiators, which is a normal part of its operation.
Blocking Error Medium Your boiler has temporarily paused its operation because it has detected a minor inconsistency in its internal readings, such as water pressure or temperature.
c High The main brain of your boiler has stopped working correctly and cannot manage the heating process.
C1 High Your boiler has detected that the water leaving the unit is getting too hot too quickly, causing it to shut down to prevent damage.
C2 Low Your boiler is working correctly but has reached its maximum temperature for the moment and is pausing until it needs to fire up again.
C3 Low Your boiler is briefly pausing itself to prevent the system from turning on and off too frequently, which helps protect the internal parts from unnecessary wear.
C4 Low Your boiler is simply cooling itself down by pushing leftover heat into your radiators after the burner has finished its cycle.
d Low Your boiler is momentarily pausing itself to prevent the system from turning on and off too frequently, which protects the components from unnecessary wear.
Display not illuminated High Your boiler has no electrical power, meaning the controls and display are completely dead.
E High Your boiler has entered a safety lockout mode and stopped working because it has detected a recurring mechanical or ignition internal fault.
E01 High Your boiler has tried to light several times but has been unable to produce a flame, meaning your heating and hot water will not work.
E02 High Your boiler has become too hot and has automatically shut itself down to prevent damage.
E03 High Your boiler has detected an issue with how exhaust gases are being cleared from the system, and it has shut down as a safety precaution.
E04 High Your boiler has stopped working because the water pressure inside the system has dropped too low to operate safely.
E05 High Your boiler has switched itself off because the fan, which safely removes exhaust fumes, is not spinning at the correct speed.
E06 High Your boiler has stopped working because it cannot correctly measure the temperature of the water inside the system.
E07 High Your boiler has detected an issue with a safety sensor that monitors the temperature of the unit’s casing, causing the system to stop working for safety.
E10 High Your boiler's main internal computer has developed a fault and can no longer communicate with the rest of the system.
E12 High Your boiler has stopped working because air is trapped in the pipes or the water isn't flowing correctly through the system.
E14 High Your boiler has switched itself off because it has detected air bubbles trapped in the system or a lack of water flow, which is causing it to overheat too quickly.
f Low Your boiler has sensed that the water inside it is too cold and has switched on its safety mode to prevent the pipes from freezing.
F (Flashing) High Your boiler has stopped working and entered a safety shutdown mode, meaning it will not provide heating or hot water until it is reset or repaired.
Fan speed High Your boiler has stopped working because the internal fan, which safely clears exhaust gases, isn't spinning at the correct speed.
H Low Your boiler is currently running at a very high heat setting, which is normal operation and not a fault.
L Low Your boiler is working normally but the temperature of the water going to your radiators is currently set to a low level.
n Emergency Your boiler has detected an electrical wiring error where the power supply wires are crossed or incorrectly connected.
o Low Your boiler is working correctly and has simply reached the required temperature, so it has paused its burner safely.
P Low Your boiler is currently running its pump to safely cool down the internal components after a period of activity.
Wiring fault Emergency Your boiler has detected an electrical wiring error where the power wires appear to be connected incorrectly, which is a significant safety risk.

Potterton Envoy 30 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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