BoilerFaultCodes.com

Ideal Mexico HE Fault Codes

Regular Natural Gas 15-36 kW 2005-2013 Discontinued
GC Numbers: 41-409-1141-409-1241-409-1341-409-1441-409-1541-409-16

Replaced by: Mexico HE (2013-present) or Mexico Linea

The fault code is already on your display

Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Most common fault codes

H......F........
Your boiler has detected a flame when there shouldn't be one, or there is an electrical fault with the sensor that tracks the flame.
Gas Safe engineer required · £120-£280
H......n........
Your boiler has detected that the electrical wiring coming into the unit is connected incorrectly, meaning the live and neutral wires are swapped.
Gas Safe engineer required · £80-160
H.....4......
Your boiler has detected that a safety sensor in the flue pipe is reporting an incorrect temperature reading.
Gas Safe engineer required · £120-190

All 19 fault codes

Code Severity Plain English
0 Low Your boiler is working correctly and is currently resting because it has already reached the desired temperature or the thermostat is turned down.
C Low Your boiler is operating normally and is currently heating either your radiators or your hot water tank.
H......F........ High Your boiler has detected a flame when there shouldn't be one, or there is an electrical fault with the sensor that tracks the flame.
H......n........ High Your boiler has detected that the electrical wiring coming into the unit is connected incorrectly, meaning the live and neutral wires are swapped.
H.....4...... High Your boiler has detected that a safety sensor in the flue pipe is reporting an incorrect temperature reading.
H1 High Your boiler has stopped working because it cannot properly measure the temperature of the water leaving the unit.
H4 High Your boiler has detected an issue with the sensor that monitors the temperature of the exhaust gases, causing the system to shut down as a safety precaution.
H9 High Your boiler has sensed that the exhaust gases are getting too hot and has shut down as a safety precaution to prevent internal damage.
HA High Your boiler has detected that the water inside is getting too hot and has shut itself down as a safety precaution.
HE High Your boiler's internal computer has encountered a critical electronic failure and can no longer control the heating process safely.
HF High Your boiler has detected a problem with the sensor that tracks the flame, meaning it cannot safely confirm if the gas is ignited and has shut down as a precaution.
Hn High Your boiler has detected that the electrical wiring is connected the wrong way around, or there is a fault with the electronics that makes it think so.
L-A High Your boiler has become too hot and has automatically shut itself down to prevent damage and ensure safety.
L-F High Your boiler has failed to light or maintain a flame, meaning your heating and hot water have stopped working.
L8 High Your boiler has stopped working because the fan inside, which helps safely push waste gases out of your home, is not spinning correctly.
L9 High Your boiler has shut down because the internal gases have reached a temperature that is dangerously high for the system.
LA High Your boiler has become too hot and has shut itself down for safety purposes.
LE High Your boiler’s internal computer has encountered a critical error and cannot communicate properly with the system.
LF High Your boiler has tried to ignite three times but failed to stay alight, so it has shut down for safety.

Ideal Mexico HE 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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