BoilerFaultCodes.com

Potterton Envoy Fault Codes

Regular Natural Gas 8.8-23.4 kW 1994-2001 Discontinued
GC Numbers: 41-590-4141-590-4241-590-4341-590-4441-590-45

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 has likely stopped because it detects it is getting too hot too quickly, often caused by air trapped in the system or a blockage preventing water from flowing properly.
May be DIY safe · £100-280
6
Your boiler has stopped working because it cannot accurately measure the temperature of the water coming back from your radiators.
Gas Safe engineer required · £90-160
7
Your boiler has detected a fault with an internal temperature monitor and has stopped running as a safety precaution.
Gas Safe engineer required · £90-160

All 20 fault codes

Code Severity Plain English
0 Low Your boiler is receiving power, but it is currently sitting in a standby mode because the control switch is not fully turned to the 'on' position.
1 Low Your boiler is still working but cannot reach its full heat output, meaning your radiators or water may not get as hot as they should.
2 High Your boiler has likely stopped because it detects it is getting too hot too quickly, often caused by air trapped in the system or a blockage preventing water from flowing properly.
3 Low Your boiler is working correctly and has simply reached the required temperature to heat your home or water.
4 Low Your boiler has temporarily paused its operation to prevent the system from turning on and off too quickly, which protects the internal components from unnecessary wear.
5 Low Your boiler is currently cooling itself down after the burner has switched off, which is a normal operation to move residual heat into your radiators.
6 High Your boiler has stopped working because it cannot accurately measure the temperature of the water coming back from your radiators.
7 High Your boiler has detected a fault with an internal temperature monitor and has stopped running as a safety precaution.
8 High Your boiler has stopped working for safety reasons and requires a manual reset to attempt to restart.
8 (Flashing) High Your boiler has stopped working and locked itself out because it failed to light or stay lit correctly.
9 High Your boiler has stopped working and locked itself for safety, likely because it failed to light or detected an internal issue.
A Low Your boiler has reached its required temperature and is simply taking a rest while it waits for the water to cool down before firing up again.
b Low Your boiler is taking a short, five-minute break to protect itself from turning on and off too frequently.
c High Your boiler's main internal computer has developed a serious fault and is no longer able to manage the heating process safely.
E High Your boiler is getting too hot too quickly, causing it to shut down for safety.
F Low Your boiler has detected that its internal water temperature is too cold and is running automatically to prevent the pipes from freezing.
H Low Your boiler is working normally but is notifying you that it has been set to provide very hot water to your radiators.
L Low Your boiler is working normally but is currently set to a low heating temperature, meaning your radiators may feel cooler than usual.
n Emergency Your boiler has detected an electrical wiring error where the power supply wires are connected incorrectly or there is a serious electrical fault.
P Low Your boiler is continuing to run the pump to help cool down the internal components after a period of heavy use, which is a normal protective function.

Potterton Envoy 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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