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Last updated: 11th December, 2023

Guides

Vaillant F61 Error Code - How To Fix

Vaillant F61 Error Code - How To Fix

Key takeaways

  • The Vaillant F61 error code is usually caused by a component failure or loose/damaged wiring between the PCB and the gas valve.
  • This error code can temporarily reset the boiler, but it is important to call a Gas Safe registered engineer to diagnose and fix the problem.
  • Regular boiler maintenance and servicing can help prevent the F61 error code from occurring.

One of the most common Vaillant boiler error codes is the F61 error code. This error code can cause your boiler to stop working, leaving you without heat or hot water.

Vaillant boilers are known for their reliability and efficiency. However, like any other boiler, they can encounter faults and errors that need immediate attention.

One of the most common Vaillant boiler error codes is the F61 error code. This error code can cause your boiler to stop working, leaving you without heat or hot water.

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Understanding the Vaillant F61 error code is crucial to fixing it. This error code is usually caused by a component failure in your Vaillant boiler. Loose or damaged wiring between the PCB and the gas valve can also cause the F61 error code.

The error code can temporarily reset the boiler, but eventually, a Gas Safe registered engineer will need to diagnose the problem and fix it.

Understanding Vaillant F61 Error Code

Vaillant boilers are known for their reliability, but like any other appliance, they can develop faults. One of the most common faults is the Vaillant F61 error code. This fault code indicates a problem with the gas valve, wiring harness, or printed circuit board (PCB).

The gas valve regulates the flow of gas to the burner and is managed by the PCB. The PCB receives information from various sensors within the boiler and throughout the heating system. If the PCB detects a fault with the gas valve or wiring harness, it will display the F61 error code on the boiler's display panel.

When the Vaillant boiler displays the F61 error code, it means that the boiler is locked out due to a dangerous error. The boiler will not operate until the fault is resolved. This is a safety feature designed to prevent potential hazards.

It is important to understand that the F61 error code is not a fault in itself. Instead, it is a fault code that indicates a problem with the gas valve or wiring harness. It is crucial to have a Gas Safe engineer inspect your boiler to determine the root cause of the F61 code.

In some cases, the F61 error code may be caused by a malfunctioning gas valve. In other cases, it may be due to problems with wiring or faulty PCB. To fix the F61 error code, a Gas Safe engineer will need to diagnose the issue and replace any faulty components.

Overall, the Vaillant F61 error code is a common fault that can be fixed by a qualified engineer. If you experience this error code, it is important to have your boiler inspected as soon as possible to prevent any potential hazards.

Identifying the Causes

The Vaillant F61 error code is a common issue that can occur in boilers. It can be caused by several factors, including faulty gas valves, gas-related problems, wiring issues, PCB faults, and component failures. In this section, we will explore some of the common causes of the Vaillant F61 error code.

Faulty Gas Valve

One of the most common causes of the Vaillant F61 error code is a faulty gas valve. A gas valve fault can occur due to several reasons, including a stuck or seized valve. This can prevent the gas valve from opening, causing the boiler to shut down. A Gas Safe registered engineer can diagnose and repair a faulty gas valve.

Gas-related Problems

Gas-related problems can also cause the Vaillant F61 error code. These issues can include problems with the gas supply or a gas valve actuation fault. A Gas Safe registered engineer is required to diagnose and repair gas-related problems.

Wiring Issues

Wiring issues can also cause the Vaillant F61 error code. Loose wiring between the PCB and the gas valve can disrupt the communication between the two components, causing the F61 code to be displayed. A wiring harness problem can also cause the F61 error code. Vibrations, wear and tear, or poor installation can cause wiring harness problems.

PCB Faults

A faulty PCB can also cause the Vaillant F61 error code. A PCB fault can occur due to several reasons, including component failure or a communication error. A Gas Safe registered engineer is required to diagnose and repair a faulty PCB.

Component Failure

The Vaillant F61 error code can also occur due to a component failure. This can include sensors, pressure, temperature, fan, pump, combustion chamber, burner, and other mechanical components. A Gas Safe registered engineer can diagnose and repair component failures.

In summary, the Vaillant F61 error code can be caused by several factors, including faulty gas valves, gas-related problems, wiring issues, PCB faults, and component failures. A Gas Safe registered engineer is required to diagnose and repair these issues.

The Dangers of F61 Error Code

The F61 error code on a Vaillant boiler is a dangerous error that should not be taken lightly. It indicates that the fuel valve actuation has failed, which means that the gas valve assembly cannot be actuated. This can lead to a potentially dangerous situation where gas is let into the combustion chamber when it shouldn't be.

When the boiler detects an F61 error, it will "lock out," which means that it will stop working until the problem is fixed. This is a safety feature designed to prevent any further damage or danger.

It is crucial to fix the F61 error code immediately to ensure the safety of your home and family. The printed circuit board of your boiler monitors several sensors to ensure that it is running safely and efficiently. If it detects a fault, it will trigger the F61 error code and shut down the boiler.

The F61 error code on a Vaillant boiler represents a significant safety concern that requires immediate attention. This error indicates that gas is being allowed into the combustion chamber when it shouldn't be, which can lead to various risks. As a consequence, the boiler will enter a "lock out" state, ceasing to function until the issue is resolved. This is a protective measure to prevent further damage or potential hazards. 

However, if not addressed promptly, the F61 error can lead to more severe problems, posing a danger to both the boiler system and the safety of the home. Given these risks, it is crucial to ensure that your boiler operates safely and efficiently. If you encounter the F61 error and are uncertain about how to rectify it, it's advisable to seek the assistance of a qualified heating engineer. Delaying repairs could result in more complex issues, underlining the importance of timely and professional intervention to protect your home and family.

When to Call a Gas Engineer

If you are experiencing the F61 error code on your Vaillant boiler, it is important to take action as soon as possible. While some issues can be resolved by homeowners themselves, others require the expertise of a qualified gas engineer. Here are some situations where it is recommended to call in a professional:

  1. If you are unsure about the cause of the error code, or if you have attempted to fix the issue but the error persists, it is best to consult with a gas engineer. They will be able to diagnose the problem and provide a safe and effective solution.

  2. If you suspect that the gas valve or wiring harness is faulty, it is important to seek professional help. These components are critical to the safe operation of your boiler and should only be handled by a qualified gas engineer.

  3. If you are experiencing other issues with your boiler, such as strange noises or leaks, it is recommended to have a gas engineer inspect your system. They will be able to identify any underlying issues and provide a comprehensive solution.

  4. If your boiler is still under warranty, it is important to contact the manufacturer or a qualified gas engineer. Attempting to fix the issue yourself could void your warranty and result in further damage to your system.

Overall, if you are experiencing the F61 error code or any other issues with your Vaillant boiler, it is important to seek professional help. A qualified gas engineer will be able to diagnose and fix the issue, ensuring the safe and efficient operation of your system.

How to Fix F61 Error Code

If you're experiencing an F61 error code on your Vaillant boiler, it's crucial to take action immediately. This error code indicates a fault in the gas valve, which could be dangerous if left unresolved. Fortunately, there are several things you can do to fix the issue.

The first step in fixing an F61 error code is to reset your boiler. To do this, turn off your boiler and wait for it to cool down completely. Then, turn it back on and see if the error code has disappeared. If the error code persists, it's time to call in a Gas Safe registered engineer.

A Gas Safe registered engineer will be able to diagnose the issue and recommend the best course of action. In some cases, the gas valve may need to be replaced. This is a job that should only be carried out by a qualified engineer, as it involves working with gas and can be dangerous if not done correctly.

If your boiler is old or beyond repair, you may need to consider a replacement boiler. A replacement boiler can be costly, but it's often the most cost-effective long-term solution. There are many affordable replacement boilers available on the market, and a Gas Safe registered engineer can help you choose the best one for your needs.

In summary, if you're experiencing an F61 error code on your Vaillant boiler, it's important to take action immediately. Try resetting your boiler first, but if the error code persists, call in a Gas Safe registered engineer. They will be able to diagnose the issue and recommend the best course of action, whether that involves repairing or replacing your boiler.

Preventing F61 Error Code

Preventing the F61 error code on Vaillant boilers is essential to ensure that your central heating system runs smoothly and efficiently. Regular maintenance and servicing of your heating system can help prevent this error code from occurring. Here are some measures you can take to prevent the F61 error code:

Annual Boiler Service

Annual boiler service is essential to keep your heating system in good working condition. A professional plumber can carry out a thorough inspection of your boiler and identify any potential issues that may lead to the F61 error code. They can also clean and maintain your boiler to ensure that it runs efficiently.

Inhibitor Topping Up

Inhibitor topping up is another essential maintenance task that can help prevent the F61 error code. Inhibitor is a chemical that prevents the build-up of sludge and corrosion in your central heating system. Topping up the inhibitor levels can help ensure that your system runs smoothly and efficiently.

Pilot Light

If your Vaillant Ecotec boiler has a pilot light, make sure it is lit. A pilot light that is not lit can cause the F61 error code to occur. If you are unsure how to light the pilot light, refer to the manufacturer's instructions or contact a professional plumber.

Hot Water

Ensure that your hot water is running smoothly. If your hot water is not running correctly, it could be a sign of a problem with your boiler, which may lead to the F61 error code. If you notice any issues with your hot water, contact a professional plumber to investigate the problem.

Energy Bills

Monitoring your energy bills can also help prevent the F61 error code. A sudden increase in energy bills could be a sign of a problem with your heating system, which may lead to the F61 error code. If you notice a sudden increase in your energy bills, contact a professional plumber to investigate the problem.

By following these preventive measures, you can help avoid the F61 error code on your Vaillant Ecotec boilers. Regular maintenance and servicing of your heating system can ensure that it runs smoothly and efficiently, reducing the risk of costly repairs and energy bills.

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Frequently Asked Questions

How do I fix the code F61 on my Vaillant boiler?

If you are seeing the F61 error code on your Vaillant boiler, it means that the gas valve cannot be actuated. This could be due to a defective cable harness, plug, gas valve assembly, or PCB. It is important to contact a Gas Safe registered engineer to diagnose and fix the issue.

What does F6 mean on a Vaillant boiler?

The F6 error code on a Vaillant boiler means that there is a fault in the flow temperature sensor. This could be due to a wiring issue, a faulty sensor, or a defective PCB. It is recommended to contact a qualified engineer to diagnose and fix the issue.

What is the F16 fault on a Vaillant boiler?

The F16 error code on a Vaillant boiler means that there is a problem with the fan or air pressure switch. This could be due to a blocked flue or air intake, a damaged fan, or a faulty air pressure switch. It is important to contact a Gas Safe registered engineer to diagnose and fix the issue.

How do I reset my Vaillant error code?

To reset a Vaillant error code, you need to turn off the boiler using the on/off switch and wait for a few seconds. Then, turn the boiler back on and check if the error code has cleared. If the error code persists, it is important to contact a qualified engineer to diagnose and fix the issue.

How do you fix an F62 fault on a Vaillant boiler?

The F62 error code on a Vaillant boiler means that there is a problem with the gas valve. This could be due to a wiring issue, a defective gas valve, or a faulty PCB. It is recommended to contact a qualified engineer to diagnose and fix the issue.

How do you clear the fault code on a Vaillant boiler?

To clear a fault code on a Vaillant boiler, you need to turn off the boiler using the on/off switch and wait for a few seconds. Then, turn the boiler back on and check if the fault code has cleared. If the fault code persists, it is important to contact a qualified engineer to diagnose and fix the issue.

Should I turn my boiler off if it has a fault code?

If your Vaillant boiler has a fault code, it is recommended to turn off the boiler using the on/off switch and contact a qualified engineer to diagnose and fix the issue. Continuing to use the boiler with a fault code could lead to further damage and potentially dangerous situations.

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Article by
Stephen Day | Co-founder
Gas Safe registered and FGAS certified engineer with over 20 years experience in the heating and cooling industry.