Vokera Combi Boiler Error Codes Your Vokera boiler may occasionally display a fault code to tell you it has developed a fault. The boiler will automatically display the unique error code that can be used to determine why the boiler is not working properly. When a malfunction code appears, the appropriate code is flashing on the display and is sometimes accompanied by a symbol. If your Vokera boiler is displaying a fault code, we recommend that you contact a Gas Safe registered engineer who can safely locate the fault and carry out any necessary corrections and repairs.
Vokera Boiler Error Code Solutions
| Fault Code | Fault Image | System Behaviour |
| _St | N/A | Autostop |
| _CL | N/A | Call for service |
| A01 | Ignition failure flame not sensed – internal fault | |
| A01 | 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 the 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 | N/A | Calibration |
| ACO | Service operation | |
| N/A | Flame on |
| Fault Code | System Behaviour |
| 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
| Fault Code | System Behaviour |
| 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 the 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 |
Vokera Evolve Combi Boiler Error Codes | Vokera Evolve System Boiler Error Codes
| Fault Code | System Behaviour |
| E10 | Flame lockout |
| E011 | Extraneous flame |
| E020 | Limit thermostat |
| E030 | Fan fault |
| E040 | Water transducer – check the system water pressure |
| E041 | Water transducer – check the 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 |
Vokèra Boiler Red Light On: Cause & Fix
Vokèra 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 Vokèra boiler is showing a red light so that your heating and hot water will work once again.
Vokèra Red Light Causes
Vokèra boilers with a constant green light and no red light means 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
Red and Green Lights On
If you’re seeing both red and green lights on your Vokèra boiler at the same time, whether they’re remaining on or flashing, your boiler could have one of the following problems:
Has been left in service mode after a recent boiler service;
- Incorrect water pressure (either too low or too high)
- Heating temperature sensors are faulty
Flashing Green Light
A constant green light on your Vokèra boiler is a sign that the flame within the boiler is working, and that’s what you want to see. Should the green light start flashing, that’s when there could be an issue to worry about:
- Faulty hot water sensor
- Boiler in standby
How to Reset a Vokèra Boiler
A simple reset could be enough to stop your Vokera boiler from flashing red and get the unit working to heat your home and hot water again.
To reset your Vokera boiler, move the mode selector switch to the ‘OFF/RESET’ position and then move it back to either ‘hot water only’ or ‘heating and hot water’. Should this reboot get your boiler working again then you’ll know because there will be a constant green light. If not, you should hire a Gas Safe engineer to come out and take a look over your boiler.