Sime Boiler Error 02

What could this fault in Sime boilers mean?

Sime boilers, known for their efficiency and warmth, can also experience faults that affect their performance and leave you without hot water in your home or office. If you encounter the error code 02 fault in these boilers, don't worry, but do pay attention, as this message indicates a water pressure issue.

Imagine your boiler as a plant that’s not receiving the necessary water to survive; this means your boiler is at risk, which is why this error appears on your device's screen. Take note of this error and consider it a safety warning to check your boiler and ensure that the water pressure is adequate for proper functioning. A boiler with low pressure cannot operate correctly, leading to a cold and uncomfortable home.

Here are the possible causes that could lead to this problem in Sime boilers:

• Insufficient gas: If the gas pressure is less than 1.2 bar, your boiler will feel too weak to work properly. Check for any issues with the gas supply and fix them so that the boiler can function again.
• Water leaks in your boiler: A leak in the boiler circuit is a nuisance that can leave you without hot water. Find the leak and repair it so that the water flows normally.
• Problem with the water circulation pump: If the circulation pump is failing, it’s like the heart of your boiler is a bit weak. Check if it needs any repairs or replacement so that the water can circulate without issues.
• Dirty or faulty safety valve: This component is responsible for releasing the boiler's pressure when it gets too high, as its name specifies, for safety reasons. If this valve is damaged, it might be releasing pressure unnecessarily, affecting the boiler’s performance.

Now that we have the causes of this problem, let’s look at the solutions you can apply to continue using your boiler normally.

How can the error code 02 fault in the Sime boiler be fixed?

Here’s a list of possible solutions for the fault displayed on your Sime boiler's screen. Take note of each of these steps, follow them precisely, and do not skip any, as they are all important:

1. Turn off the boiler and disconnect it to restart and reset the sensors: Sometimes, the solution to complex problems can be very simple and easy. This trick works like magic and involves completely turning off your boiler and letting it rest for a bit by disconnecting it from the power outlet. Wait a few minutes (about 10 to 15) and then reconnect it. Turn it on and check if the error has disappeared, as this procedure performs a simple reset of the boiler’s sensors. If the problem persists, don’t worry, we have more things to try.
2. Check the gas supply to your Sime boiler: Is your gas service active and/or is the gas cylinder fully charged? Make sure that your boiler is indeed receiving the gas it needs to operate, as this is the fuel that ignites the flame to heat the water. The gas supply is one of the most important resources your boiler needs to function properly, besides water, which is also very important. If you’ve confirmed that everything is fine with the gas supply, then let’s proceed to check the water supply.
3. Check the water supply to your Sime boiler: Are you sure that water is flowing through your boiler’s circuit? Let’s start with the simplest step, which is the water shut-off valve. Open the shut-off valve supplying water to your boiler fully, and also open all other faucets in your house to verify if you have an active and flowing water supply. Remember, if your boiler does not receive the water it needs to work, it will simply block and display an error on the screen.
4. Check and adjust the water pressure reaching your Sime boiler: The water pressure should be within the ranges specified by the manufacturer, in this case, Sime. Typically, this pressure should be between 1.2 and 1.5 bar. You will need to use a pressure gauge to check if the pressure is adequate; however, consult the manufacturer’s manual to see how you can adjust this pressure and increase it if necessary. Once you have made the necessary adjustments and ensured that the water pressure is appropriate, please check if the problem with your boiler persists.
5. Check the circulation pump of your Sime boiler: The circulation pump might be the problem since it is responsible for moving all the water through your boiler’s circuit. This component acts like the heart of your boiler, so it needs to be in good condition to function optimally. Check and verify if the pump makes any strange noises. If you have technical knowledge, you can completely disassemble it and perform maintenance to remove any obstruction it may have. Also, check it with a multimeter to ensure everything is functioning well electronically and that the connection with the boiler’s electronic board is correct.
6. Check the safety valve of your Sime boiler: A faulty safety valve will not allow a free flow of water. We recommend thoroughly inspecting it to see if it needs maintenance or replacement. Check if this valve has water leaks, and whether it does or doesn’t, we recommend dismantling it for maintenance. Clean it with water and vinegar, using a soft-bristle brush. If you find the valve is damaged, you will need to replace it with a new one that matches the model of the one you removed.
7. Check the entire water circuit of your boiler for unwanted leaks: Ensure that the boiler has no leaks throughout the water circuit, as any type of leak can affect the internal pressure of the boiler and cause operational failures. To check this, you will need to inspect the hoses, joints, connections, filters, and valves—basically everything related to the water circuit. It may be a laborious task, but it’s for the good of your boiler and the comfort and convenience of your home. Check everything thoroughly, and if you find any leaks, make the necessary repairs or replace the affected components and parts with new ones to avoid future leaks.
8. If the problem with your boiler persists, carefully review each step we’ve explained in this article: Have you followed all the steps, but the problem persists with your Sime boiler? Don’t get discouraged. Ensure you haven’t skipped any steps we’ve mentioned in this guide. If you still can’t find the solution, it’s time to consult a qualified expert. We encourage you to briefly review everything we’ve recommended in this article before seeking professional help.
9. If the problem continues, don’t worry because experts have the right solution: A trusted qualified technician or the official Sime technical service will help solve your boiler’s fault in no time. They have the necessary experience and knowledge, along with the tools and original parts, to address this situation in the best possible way, ensuring a quick and effective repair. You can call them to schedule an appointment for a home visit. Don’t hesitate to seek professional help to get your boiler working correctly again!

In summary, to solve the error code 02 fault in Sime boilers, you need to follow all the steps provided in this guide. This fault is due to low pressure in the boiler circuit, and the causes can include: low gas pressure, water leaks in the circuit, a damaged circulation pump, and/or a dirty or faulty safety valve.

Remember, if you can’t resolve the problem yourself, you can always rely on Sime’s technical support or a trusted boiler technician. Don’t get discouraged and focus on fixing your boiler, as it doesn’t mean you need to replace it entirely; this problem has a solution. Thank you for reading up to this point, and good luck!