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  • Common Sime Boiler Error Codes

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  • Common Sime Boiler Error Codes

    Updated: April 16, 2024

    What are boiler fault codes?

    Boiler fault codes are alphanumeric or numerical error messages displayed by boilers to indicate specific issues or malfunctions within the heating system. Modern boilers are equipped with sophisticated control systems that can detect problems and generate fault codes to help users and technicians identify and address issues quickly.

    sime boiler fault codes

    If you are having issues with your Sime boiler and your boiler is displaying an error code then you have come to the right place. On this page we will try to deal with Sime boilers error codes and what they mean. In addition, we will offer some possible solutions to these problems.

    A boiler would usually turn itself off or in other words ‘lockout’ itself when it is experiencing certain issues. This is done in order to protect itself from any further or potential damage.

    After that, an error code will be shown on your boiler to provide both you and the heating engineer of the problem your boiler is having.

    On this page, you will find every Sime boiler error or fault code your boiler might be showing. This can help you get a clearer picture of what the problem is and it can also help you know how much it will cost you to fix the problem.

    However, it is recommended that your follow the boiler manual instructions for more clarification. Consulting a Gas Safe engineer is always safer than trying to fix the problem yourself.

    Who are Sime Boilers?

    Sime are known for their innovative domestic and commercial heating solutions which are designed and produced in Italy. However, their products are tailored to suit the British climate and weather conditions. Their boilers provide advanced and efficient heating when it comes to hot water solutions.

    Sime have a reputation for being reliable. Their products stand out for their durability and well performance. Sime boilers are stylish and well known for their innovative engineering.

    Common Sime boiler problems?

    Low pressure

    One of the most common issues in boilers is low pressure. This is often what causes a boiler to stop working. You can tell that the pressure is low by checking the pressure gauge. If it is, then it is fairly easy to fix.

    In your boiler manual, you can find a step-by-step instructions. These instructions can help you know how to top up the pressure. In most cases, the boiler will reset itself automatically and the error code will be gone after doing this step.

    Air in the system

    Your radiators can stop working when there is air in your system. When your heating is turned on for the first time in months and you find out that they are not working, then this might mean that your radiators need bleeding. The procedure of bleeding radiators is actually simple. First, you need to remove the valve on the side of your radiator in order to let out the trapped air. You need to make sure that the heating is off before doing this. What is more, have a bowl ready in case of water escape.

    You should also keep in mind that bleeding your radiators can also lead to low pressure. After finishing, make sure to check the water pressure in your system.

    Read more: Ferroli Boiler Error Codes / Fault codes List

    Common Sime Boiler Error Codes

    Common Sime Boiler Error Codes

    sime boiler fault code AL02

    Reason: Low water pressure in the system

    How to solve AL02 Sime error code?

    Restore pressure

    You will be able to see the bars on the pressure gauge going down below the standard level if your boiler pressure is low.

    It is recommended that you check your boiler manual so as to learn how to re-pressure your boiler. Step by step instructions will be included in the manual.

    After you have re-pressured your boiler, you should give it a quick reset. Most boilers can automatically reset and after that the error code will disappear.

    Check for any leaks in the system

    If you have finished repressurising your boiler but then noticed a drop in your boiler pressure, then you will need to consult a Gas Safe engineer. If there is a leak, then a Gas Safe engineer need to reseal or maybe re-pipe your system where there is need for re-piping.

    sime boiler fault code: AL03

    Reason: High water pressure in the system

    How to solve AL 03 Sime error code?

    This job should be carried out by a heating engineer. They will first empty the system via the drain valve on the Hydraulic assembly in order to bring the pressure to approximately 1.2 bar.

    sime boiler fault code: AL04

    Reason: Domestic hot water sensor (SS) fault

    How to solve AL 04 Sime error code?

    The heating engineer will have to check connections and replace the sensor in order fix this problem.

    sime boiler fault code: AL05

    Reason: Delivery sensor (SM) fault

    How to solve AL 05 Sime error code?

    To fix this issue, the heating engineer will need to check connections and replace the sensor.

    sime boiler fault code: AL06

    Reason: No flame detection

    How to solve AL 06 Sime error code?

    The heating engineer will have to perform the following tasks:

    • Check the integrity of the electrode and

    • Check that it is not grounded

    • Check gas availability and pressure

    • Check the operation of the gas valve

    Error code: AL07

    Reason: Safety thermostat (TS) intervention

    How to solve AL 07 Sime error code?

    The following procedures should be done by the heating engineer:

    • Check the sensor or thermostat connections

    • Deaerate the system

    • Check the bleed valve

    • Replace the sensor or the thermostat

    • Check that the pump impeller is not blocked

    sime boiler fault code: AL08

    Reason : Fault in the flame detection circuit

    How to solve AL 08 Sime error code?

    The heating engineer will do the following:

    • Check the integrity of the electrode and check that it is not grounded

    • Check gas availability and pressure

    • Check the operation of the gas valve

    sime boiler fault code : AL09

    Reason: No water circulating in the system

    How to solve AL 09 Sime error code?

    A heating engineer to:

    • Check the rotation of the system pump impeller

    • Check the electrical connections

    • Replace the pump (if necessary)

    sime boiler fault code: AL10

    Reason: Auxiliary sensor fault

    How to solve AL 10 Sime error code?

    • Check the hydraulic configuration in the boiler

    • Check the electrical connection

    sime boiler fault code: AL11

    Reason: Auxiliary sensor fault

    How to solve AL 11 Sime error code?

    The electrical connection should be checked.

    sime boiler fault code AL12

    Reason: Incorrect configuration of the open/sealed chamber

    How to solve AL12 Sime error code?

    The parameter tS 0.4 (Combustion configuration) should be set to 0

    sime boiler fault code: AL13

    Reason: Exhaust sensor (SF) intervention

    How to solve AL 13 Sime error code?

    • Replace the smoke probe

    • Contact the Technical Assistance Centre

    sime boiler fault code: AL14

    Reason: Exhaust sensor (SF) fault

    How to solve AL 14 Sime error code?

    • Replace the smoke probe

    • Check the electrical connection of the smoke probe, if the problem is not resolved, contact the Assistance Centre

    sime boiler fault code AL15

    Reason: Fan check cable disconnected

    How to solve AL 15 Sime error code?

    The connection cable between the fan and the board should be checked.

    sime boiler fault code: AL18

    Reason: Condensate level fault

    How to solve AL 18 Sime error code?

    • Check for any clogging in the pipe which takes the condensate to the siphon

    • Check that the siphon is not clogged

    sime boiler fault code: AL28

    Reason: Maximum number of consecutive resets reached (6)

    How to solve AL 28 Sime error code?

    • Contact the Technical Assistance Centre AL 37 Fault due to low network voltage.

    • Check with tester

    • Contact network provider (ENEL)

    sime boiler fault code: AL40

    Reason: Incorrect supply frequency detected

    How to solve AL 40 Sime error code?

    Contact network provider (ENEL)

    sime boiler fault code: AL41

    Reason: Flame loss more than 6 consecutive times

    How to solve AL 41 Sime error code?

    • Check the detection electrode

    • Check the gas supply (open valve)

    • Check mains gas pressure

    sime boiler fault code: AL42

    Reason: Button fault

    How to solve AL 42 Sime error code?

    Check if the buttons are working

    sime boiler fault code AL43

    Reason: Open Therm communication fault

    How to solve AL 43 Sime error code?

    The electrical connection of the remote control should be checked.

    sime boiler fault code: AL62

    Reason: Self-calibrating procedure is required

    How to solve AL 62 Sime error code?

    The self-calibrating procedure should be carried out.

    sime boiler fault code AL72

    Reason: Incorrect positioning of the delivery sensor

    How to solve AL 72 Sime error code?

    Make sure that the delivery sensor is attached to the delivery pipe.

    sime boiler fault code: AL81

    Reason: Block due to combustion during start-up

    How to solve AL 81 Sime error code?

    • Check for blockage in flue

    • Bleed the air from the gas circuit

    sime boiler fault code AL83

    Reason: Block due to combustion during start-up

    How to solve AL 83 Sime error code?

    Check for any blockage in the flue.

    sime boiler fault code AL96

    Reason: Lockout due to flue (exhaust) blockage

    How to solve AL 96 Sime error code?

    Check for any blockage in flue

    Read more about:

    Ravenheat Boilers Error Codes / Fault Codes List

    Biasi Boiler Error Codes / Fault Codes 

    Common Sime Boiler Error Codes

    Why is my Sime boiler flashing green and red?

    The green LED flashing indicates an issue with the fan/smoke pressure switch. If the LED is flashing orange, it signifies a lack of water circulation. A flashing red LED signals a problem in the post-condenser line.

    Read about: ATAG Boiler Error Codes / Fault Codes

    How to check and fix boiler fault codes

    To check and fix boiler fault codes, you can follow these general steps:

    Understand the Boiler Manual: Refer to the boiler’s manual or user guide. It contains valuable information about fault codes specific to your boiler model, their meanings, and potential troubleshooting steps.

    Identify the Fault Code: When the boiler displays a fault code, take note of the specific code or error message. It may be a combination of numbers, letters, or both. This code will help you diagnose the issue.

    Refer to the Manual or Manufacturer’s Resources: Consult the manual or visit the manufacturer’s website to find information related to the specific fault code. Manufacturers often provide troubleshooting guides, FAQs, or specific instructions to address common issues associated with each fault code.

    Follow Troubleshooting Steps: The manual or manufacturer’s resources may provide specific troubleshooting steps for each fault code. These steps might involve checking specific components, sensors, or connections. Follow the instructions carefully to diagnose and resolve the problem.

    Contact a Professional: If you are unsure about performing any troubleshooting steps or if the fault code persists after attempting the recommended solutions, it’s best to contact a qualified heating engineer or the manufacturer’s technical support helpline

    Read more: Glow-Worm Boiler Error Codes / Fault Codes

    When should I get a new boiler?

    However, in some cases, getting a new boiler might be more cost-effective than getting your old boiler fixed. Some issues might be costly to fix. What is more, a new boiler will probably be more efficient and can help you save both money and energy. That is why getting a new boiler is a good investment in the long run.

    Get a quote from Let’s Heat. We have a large range of products and our staff of Gas Safe engineers provides an excellent service that is both professional and reliable. In addition, we can help you get the boiler that best fits your house and heat requirements.

    Read about: Ariston Boiler Error and Fault Codes

    Intergas Boiler Error Codes / Fault Codes 2024

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    FAQs

    Where are Sime boilers made?

    Sime Boilers have been a global leader in the manufacture of state of the art boilers for hydronic heaters for over 40 years. They are designed and manufactured in Italy. In addition, they have been in Australia for over 30 years.

    Are Sime boilers good?

    Sime boilers are energy-efficient, environmentally friendly and they carry the mantle not only in producing the boilers but also in the design of the boiler and even its packaging. Lovers of nature will definitely have an extra reason to consider buying a Sime boiler for their homes.

    What does AL mean on a SIME boiler?

    AL 41 Flame loss more than 6 consecutive times