Vokera boiler fault codes
| _St | Autostop |
| _CL | Call for service |
| A01 | Ignition failure flame not sensed – internal fault |
| A02 | Limit thermostat fault |
| A03 | Fan fault |
| A04 | Insufficient system water pressure |
| A06 | Domestic how water (DHW) thermistor fault |
| A07 | Primary flow thermistor fault – temperature of water is too high. |
| A08 | Return thermistor fault – water temperature too high. |
| A09 | Flue thermistor or flue thermistor counter fault. |
| A11 | False flame |
| A77 | Low temperature thermostat fault |
| ADJ | Calibration |
| ACO | Service operation |
| N/A | Flame on |
| P | Preheating function active |
| P Blinking | Preheating function running |
| Hours | Stand-by |
| — | Off |
| 01 | Failure to ignite |
| 02 | Overheat |
| 03 | Problem with fan/flue |
| 04 | Insufficient water pressure |
| 05 | Reset as described for code 01 |
| 06 | Hot water thermistor open circuit |
| 07 | Primary thermistor open circuit |
Vokera Mynute Boiler Error Codes
| AL10, AL20, AL21, AL26, AL28, AL34 | Try resetting the boiler, if the fault reoccurs you need to contact a heating engineer. |
| AL40 | Check the system’s pressure and refill if necessary. Reset the boiler, if the fault reoccurs then you need to contact a heating engineer. |
| AL41 | Check system pressure – refill if necessary. If fault reoccurs, contact a heating engineer. |
| AL52, AL55, AL60, AL71,AL73, AL74, AL79 | Contact a heating engineer. |
| AL74, AL79 | Reset the boiler. If the fault reoccurs, contact a heating engineer. |
Evolve Combi Evolve System Error Codes
| E10 | Flame lockout |
| E011 | Extraneous flame |
| E020 | Limit thermostat |
| E030 | Fan fault |
| E040 | Water transducer – check system water pressure |
| E041 | Water transducer – check system water pressure |
| E042 | Water transducer fault |
| E060 | Domestic hot water probe fault |
| 4070 | Fault flow sensor over temperature – flow sensor flow/return line probe differential alarm |
| E077 | Main zone water thermostat |
| E080 | Error with return line probe – over temperature outlet or differential alarm |
| E090 | Flue gases over temperature probe |
| E091 | Clean primary heat exchanger |
| — | Water pressure low |
| — | Water pressure high |
| — | Boiler board communication lost |
| — | BUS 485 communication lost |
| E021, E022, E023, E024, E067. E088, E097 | Iono alarm |
| E085, E094, E095 | Combustion fault/high CO |
| E058 | Main voltage error |
| E065 | Current modulation alarm |
| E086 | Obstruction fumes alarm |
Vokera Boiler Red Light On: Cause & Fix
Vokera boilers with a red light, that’s either flashing or on constantly, have a fault and will most likely lockout, leaving your home without heating and hot water.
There are many potential faults that could be causing this issue and you should hire a Gas Safe engineer to diagnose and fix the fault with your Vokèra boiler. However, my guide will get you closer to the reason why your Vokera boiler is showing a red light so that your heating and hot water will work once again.
Vokera Red Light Causes
Vokera boilers with constant green light and no red light mean there’s nothing to worry about and your boiler will provide heating and hot water as normal. However, should you see a red light on its own or alongside the green light then there could be a potential fault with your boiler.
Below, we’ve listed the issues that can cause various sequences of light you’re likely to see on your Vokèra boiler when it’s broken.
Red Light On and Green Light Off
A constant red light on your Vokèra boiler means that the unit has gone into lockout for safety reasons. Some of the possible faults behind this include:
- The boiler is overheating
- The pump isn’t circulating hot water around the central heating system or to the taps when required
- Potentially harmful flue gases aren’t being expelled due to an issue with the fan