Ferroli Boiler Error A21

What could the A21 error code mean for Ferroli boilers?

Do you have a Ferroli boiler and the A21 error code has appeared on the screen? Well, we want to inform you in advance that this error code can be somewhat challenging to resolve. But don't worry, in this article, we will explain what this error means for your boiler, what its possible causes are, and how you could resolve it most effectively.

The A21 error code in Ferroli boilers indicates that there is a problem with the boiler's electronic PCB board, which is responsible for controlling and regulating the operation of all the appliance's components. This error can be due to various reasons, such as a power supply failure, poor cable connection, a sensor malfunction, or incorrect settings in the boiler's parameters.

If you encounter this error, the first thing you should do is check the status of the electrical installation and ensure there are no power cuts, overvoltages, or burnt fuses. But let's see in detail how you could solve this problem.

Could the A21 error code be resolved in Ferroli boilers?

Here's a list of solutions you can try yourself to attempt to resolve this issue and continue using your boiler normally. Remember, if this situation becomes too complicated, you can always call Ferroli's official technical service:

1. Turn off and disconnect the boiler from the power supply to reset it: If your boiler displays the A21 error code on the screen, you can first try resetting it to attempt to fix this issue, as this may help reset the boiler system and eliminate possible temporary errors. To do this, simply turn off your boiler completely and disconnect it from the power supply for a few minutes. Then, reconnect your boiler and turn it on to check if the A21 error code has disappeared.
2. Reset your boiler to its default factory settings: Consult your Ferroli boiler user manual and reset all parameters to their default values. This will completely reset your boiler system and leave it almost as if it were newly installed today.
3. Check that the electrical supply is adequate for your Ferroli boiler: This problem may have originally arisen due to power surges or spikes in the electrical supply. In that case, we recommend conducting a general review of the electrical supply to your home. Remember that grounding is also important to prevent damage or overloads to your appliances.
4. Check the connection of the cables from the electronic PCB board to the other components of the boiler: Thoroughly inspect all the internal wiring of your Ferroli boiler and ensure that everything is in perfect condition. Remember that boilers are devices designed to operate at very high temperatures; however, the insulation of the cables may deteriorate over time, so it is possible that the wiring could be damaged. It also often happens that rodents chew on the cables of your boiler. Check that the internal wiring of your boiler is not loose, cut, bitten, burnt, or scorched. Also, check the connections and the tips of these cables. If you notice that the wiring is in poor condition, proceed with the necessary repairs.
5. Check the condition of the temperature, pressure, and water flow sensors of the boiler: These sensors send information to the electronic PCB board for it to regulate the boiler's operation. If any of them are defective or dirty, it can cause an error in the reading and generate a false positive like the A21 error code. Use an electronic cleaner and perform maintenance on these sensors with a dry, soft cloth, and check for any visible damage.
6. Verify the boiler's parameter settings according to the user manual instructions: It is possible that some parameter has been altered for some reason and that this affects the operation of the electronic PCB board.
7. Inspect the electronic PCB board of your boiler with a multimeter: Use the appropriate tools and your electronics knowledge to successfully perform this task. Try to thoroughly check each component of your boiler's electronic PCB board and be prepared to replace any that are burnt out or malfunctioning.
8. Repeat all the aforementioned steps if your boiler's problem persists: If the problem persists after you have followed all the steps we have indicated, then we recommend doing a brief review of everything. Please pay more attention to detail and follow the steps to the letter. Make sure you haven't skipped any of the steps we have previously indicated, as they are all important.
9. Call Ferroli technical service and request a home visit for a more thorough inspection of your boiler: If you have followed the steps and have reviewed everything we have indicated and still have not been able to fix the problem, then most likely the electronic PCB board of your boiler is damaged and needs to be replaced with a new one. In that case, Ferroli's technical service can accurately diagnose the cause of the A21 error code and offer you the most appropriate solution for your case. Give them a call, explain the problem, and arrange a home visit with them. After the repairs, they will give you a warranty, and with that, you have ensured the proper functioning of your Ferroli boiler.

In summary, the A21 error code indicates that there is a fault in the Ferroli boiler's electronic PCB board, which may have various causes related to the electrical installation, cable connections, sensor condition, or parameter settings. To resolve it, you can follow a series of steps ranging from resetting the boiler to changing the electronic PCB board to a new one, through checking the connections, cleaning the sensors, and verifying the boiler's parameters.

That's all for today! We hope we've been very helpful today and that you've been able to resolve the A21 error code on your Ferroli boiler without any major complications. Remember, if you have any questions or need professional help, you can contact Ferroli's official technical service. Good luck and see you next time!