0345 3192 247
Updated on 8th December, 2023 by Martin Astley
When it comes to choosing a boiler in the UK, The Ideal boiler is one of the popular brands that customers choose. Providing central heating to your homes for over a hundred years Ideal Boiler has developed recognition as one of the most reliable boiler manufacturers. But that doesn’t mean ideal boilers aren’t prone to faults and errors; they are!
In this article, I will tell you the common Ideal boiler fault codes of different boilers, including system, regular, and combi boilers. Also, I will be telling you possible solutions for each fault.
F Fault Codes
L Fault Codes
C Fault Codes
D Fault Codes
Other Faults Description
Common Ideal boiler fault codes regardless of the type of system
| Fault Code | System Behaviour | Possible Solution |
|---|---|---|
| F | The boiler is operating in frost mode | No action is needed; this is normal behaviour. |
| FD | No water Flow | This issue indicates a problem with the installation of your boiler. Try repressurising your boiler; if this does not solve the issue, then contact your installer and let him rectify this issue. |
| F1 | Low water pressure | Check the boiler pressure and refill if necessary, make sure it is at 1.5 bars. Look for any signs of leaks and get them repaired. |
| F2 | Flame Loss | Check the gas supply to the boiler. Ensure the boiler’s gas valve is open and the pilot light is on. If the issue persists, contact a qualified technician for assistance. |
| F3 | Fan Fault | Check if the fan is operating properly. Clean or replace the fan if it is not functioning correctly. If the problem persists, contact a certified Gas Safe Engineer to get the problem solved. |
| F4 | Flow thermistor fault | To solve the flow thermistor fault, you will have to contact a Gas Safe Engineer. |
| F5 | Return thermistor fault | Fault with return thermistor can occur due to operational issues or damaged connection; to solve this problem, you will have to contact a certified professional. |
| F6 | Outside sensor failure | Check the outside sensor and its wiring for any issues. Replace the outside sensor if it is faulty. Also, it is recommended to get your problem inspected by a Gas Safe Engineer as the problem might be related to the PCB. |
| F7 | Low mains voltage | Check the mains voltage and ensure it is within 190 VAC. Contact a certified professional if the voltage drops below 190 VAC. |
| F9 | Unconfigured printed circuit board (PCB) | It is recommended that you invest in a new boiler or get a boiler on finance rather than repair the PCB as it can be quite expensive. |
| L1 | Flow temperature overheat or no water flow | Check the flow of water and ensure it’s not blocked. Inspect the flow temperature and adjust it by resetting your boiler. If the problem persists, contact a Gas Safe Engineer. |
| L2 | Ignition lockout | Check the gas supply and the pilot light. Ensure the gas valve is open and there are no issues with the gas supply. If the problem persists, contact a Gas Safe Engineer. |
| L5 | 5 boiler resets in 15 minutes | Check for any issues causing frequent resets, such as low water pressure or a faulty sensor. Contact a qualified technician or certified engineer for further inspection. |
| L6 | False flame lockout | Reset the boiler and check for any issues with the flame detection mechanism. Contact a qualified engineer if the issue persists. |
| C | The boiler has a call for central heating, but the appliance has reached the desired temperature set on the boiler OR The boiler is operating in hot water mode | Check the thermostat settings and ensure they are correctly set. If the boiler is operating in hot water mode, check the hot water settings. |
| C0 | Boiler chip card (BCC) activation fault | Reset the boiler and check if the fault persists. If the fault persists, contact a qualified technician for assistance. |
| C2 | Boiler chip card (BCC) fault | Contact a qualified technician to inspect and replace the chip card. |
| D | The boiler has a call for hot water, but the appliance has reached the desired temperature set on the boiler | Check the hot water temperature settings. If the issue persists, contact a qualified technician for assistance. |
| 0 | The boiler is in standby mode awaiting either a central heating call or a hot water demand | No action is needed; this is normal behaviour. |
Ideal Logic Max System / Logic Plus System Boiler Error Codes
The Logic+ and Logic Max boiler ranges are a perfect blend of efficiency and robust design, making them the optimal choice for your central heating system. These boilers, manufactured by Ideal, provide reliability and comfort, ensuring a seamless experience. However, errors and fault codes can occur due to various reasons.
Nevertheless, there is no need to worry, as I will now outline the common error codes and their possible solutions, enabling you to address any issues that may arise effectively.
| Fault Code | System Behaviour | Possible Solution |
|---|---|---|
| L1 | Flow temperature overheat lockout or no water flow lockout | Check the flow of water and ensure it’s not blocked. Inspect the flow temperature and adjust it by resetting your boiler. If the problem persists, contact a Gas Safe Engineer. |
| L2 | Ignition lockout | Check the gas supply and the pilot light. Ensure the gas valve is open and there are no issues with the gas supply. If the problem persists, contact a Gas Safe Engineer. |
| LC | 5 boiler resets in 15 minutes | Turn the electrical supply to the boiler off and on. If the boiler fails to operate, contact your boiler manufacturer or provider. |
| L6 | False flame lockout | Reset the boiler and check for any issues with the flame detection mechanism. Contact a qualified engineer if the issue persists. |
| F1 | Low water pressure | Check the boiler pressure and refill, if necessary, make sure it is at 1.5 bars. Look for any signs of leaks and get them repaired. |
| F2, FN or LN | Flame loss | To make sure you have a gas supply at your property, check if other gas appliances in the house are working properly. If they’re not working or you can’t test them, ensure the gas supply is turned on at the meter or check if your pre-payment meter has enough credit. If your boiler stops working, contact the manufacturer or provider for help as soon as possible. |
| F3 | Fan Fault | Check if the fan is operating properly. Clean or replace the fan if it is not functioning correctly. If the problem persists, contact a certified Gas Safe Engineer to get the problem solved. |
| L4 or F4 | Control / no flow thermistor fault | Restart your boiler. If the boiler fails to operate after the restart, contact a Gas Safe Engineer or the manufacturer if the boiler is under warranty. |
| L5 or F5 | Return thermistor fault | Try restarting your boiler. If it fails to operate, either contact a Gas Safe Engineer or the manufacturer if your boiler is under the warranty period. |
| F6 | Outside sensor fault | Try restarting your boiler. If it fails to operate, either contact a Gas Safe Engineer or the manufacturer if your boiler is under the warranty period. |
| F7 | Low mains voltage | Contact the electricity provider. |
| F9, L9, F8 or L8 | Printed circuit board (PCB) unconfigured or fault | This is an internal fault for which you will have to contact a Gas Safe professional. |
| FU | Diff greater than 50c check isolation valves are open | If the problem persists and the boiler is not operating, contact your manufacturer if the boiler is under the warranty period. If not, contact a Gas Safe Engineer. |
Ideal Logic Max Plus Combi Boiler Error Codes
Ideal’s Logic Max Combi boilers are just like the Logic Plus and Logic Plus Max; the Ideal Logic Max Combi Boiler provides the same features and benefits with an easy-to-reach pressure gauge on the front panel and frost protection to eliminate the risk of cold weather damage during the winter.
Their error codes will be displayed on your screen with time, but there is no need to worry; below, I will mention standard boiler error or fault codes and possible solutions.
| Fault Description | System Behaviour | Possible Solution |
|---|---|---|
| Overheat lockout | The boiler is becoming overheated due to excessive pressure. | Bleed radiators, refill system to 1.2 bar. Check that all radiator and boiler valves are open and reset the boiler. If the fault continues, book an engineer. |
| Ignition lockout | A safety measure that is implemented by the boiler due to blockages caused by sludge buildup and a frozen condensate pipe. | Check the gas supply and the pilot light. Ensure the gas valve is open and there are no issues with the gas supply. If the problem persists, contact a Gas Safe Engineer. |
| Too many restarts | 5 starts within 15 minutes. | Check for any issues causing frequent resets, such as low water pressure or a faulty sensor. Contact a qualified technician or certified engineer for further inspection. |
| Flame on before gas on | False flame lockout. | Reset the boiler and check for any issues with the flame detection mechanism. Contact a qualified engineer if the issue persists. |
| Water pressure | Low water pressure causes your boiler to cease operation and impair its performance. | Reset the boiler and check for any issues with the flame detection mechanism. Contact a qualified engineer if the issue persists. |
Ideal Vogue Boiler Error Codes
Thanks to their high-quality components, the Ideal Vogue Gen2 and Vogue Max system boilers offer exceptional style and performance. However, it is not uncommon for specific fault codes to appear on the system due to various reasons. In the following section, I will outline some of the most common boiler error codes and provide potential solutions for each.
| Fault Code | System Behaviour | Possible Solution |
|---|---|---|
| F1 | Low water pressure | Check the system water pressure is between 1 and 1.5 bar on the system pressure gauge. To re-pressurise the system, see section 3 of the user manual provided above or follow the WarmZilla guide to repressurise your boiler. |
| F2 OR FL | Flame loss | To make sure you have a gas supply at your property, check if other gas appliances in the house are working properly. If they’re not working or you can’t test them, ensure the gas supply is turned on at the meter or check if your pre-payment meter has enough credit. If your boiler stops working, contact the manufacturer or provider for help as soon as possible. |
| F3 | Fan fault | Check if the fan is operating properly. Clean or replace the fan if it is not functioning correctly. If the problem persists, contact a certified Gas Safe Engineer to get the problem solved. |
| F4 or L4 | Flow thermistor fault | Restart your boiler. If the boiler fails to operate after the restart, contact a Gas Safe Engineer or the manufacturer if the boiler is under warranty. |
| F5 or L5 | Return thermistor fault | Try restarting your boiler. If it fails to operate, contact a Gas Safe Engineer or the manufacturer if your boiler is under the warranty period. |
| F6 | Outside sensor failure | Try restarting your boiler. If it fails to operate, contact a Gas Safe Engineer or the manufacturer if your boiler is under the warranty period. |
| F7 | Low mains voltage | Contact the electricity provider. |
| F9 or L9 | Unconfigured PCB | This is an internal fault for which you will have to contact a Gas Safe professional. |
| L1 | Flow temperature overheat or no water flow | Check the flow of water and ensure it’s not blocked. Inspect the flow temperature and adjust it by resetting your boiler. If the problem persists, contact a Gas Safe Engineer. |
| L2 | Ignition lockout | Check the gas supply and the pilot light. Ensure the gas valve is open and there are no issues with the gas supply. If the problem persists, contact a Gas Safe Engineer. |
| L6 | False flame lockout | Reset the boiler and check for any issues with the flame detection mechanism. Contact a qualified engineer if the issue persists. |
| LC | 5 boiler resets in 15 minutes | Turn the electrical supply to the boiler off and on. If the boiler fails to operate, contact your boiler manufacturer or provider. |
| FU | Flow/return differential – 50°C | If the problem persists and the boiler is not operating, contact your manufacturer if the boiler is under the warranty period. If not, contact a Gas Safe Engineer. |
Conclusion
If you observe any of these error codes flashing on the display of your Ideal boiler, it indicates that your boiler needs assistance. Depending on the specific error code, you are now equipped with the knowledge to address the issue. In the event of a severe fault, it may be necessary to seek the expertise of a professional engineer.
However, there are instances where the boiler may be beyond repair, and replacement becomes necessary. But there is no need to panic, and if your problem still needs to be solved even after reading the above fault code guide, then call us at 0345 3192 247 and one of our representatives will assist you and try to solve your problem on-call. If you are unsatisfied, we will book your appointment with an engineer.
Get a new boiler
today!
Get your new boiler and save your heating bill yearly with new energy efficient boiler.
Frequently Asked Questions (FAQs)
Why is my Boiler Flashing E1?
This is a lesser-known boiler error code but if displayed, it means the pressure on your boiler has dropped and a water leak is stopping your system from functioning properly. In this case, you will have to repressurise your system to fix this problem.
Why is my Boiler Flashing F?
The Ideal boiler error code F is a common fault, displayed when your boiler has low water pressure. This is luckily an easy problem to fix yourself.
What do the numbers on my Boiler mean?
The numbers on the dial of the boiler are usually marked from Minimum to Maximum. This displays the water temperature that will be pumped from the boiler. If it is set higher, the system will heat your home faster and more effectively.
What does L2 Fault mean on an Ideal Boiler?
The Ideal boiler L2 fault means there is flame loss or some issue that can lead to a lockout. This can happen during operation due to low gas pressure, faulty gas valve, or flue sensor.
How do I restart my Ideal Boiler?
When you get directed to restart your boiler due to the listed fault codes, press the “RESTART” button (F). Your boiler will then repeat its ignition sequence. If the boiler still does not start properly, consult a Gas Safe Registered Engineer.
What does Status “C” mean on a Boiler?
The Ideal boiler status “C” means your boiler has a central heating demand. This issue can be resolved by pressing reset on the boiler – you will not have to turn the boiler off at the wall for this.
