How to Fix the Vaillant F32 Fault Code

Are you experiencing problems with your Vaillant boiler? Do you see the dreaded F32 error code on display? Don’t panic! This common issue in Vaillant ecoTEC and ecoMAX boilers can often be resolved with the help of a qualified professional. But, it’s important to understand the cause and symptoms of the F32 fault code to prevent further damage to your heating system.

This comprehensive guide will delve into the F32 fault code, providing you with all the information you need to address the issue and get your heating back up and running.

Jump to a topic:

1. What is Vaillant F32 Fault Code?
2. Understanding the Fault Code
3. The Causes
4. Signs and Symptoms
5. Consequences of Not Addressing the F32 Fault Code
6. How to Prevent the F32 Fault Code

What is Vaillant F32 Fault Code and How to Fix It?

A Vaillant boiler displaying the letter ‘F’ followed by a number indicates a fault that requires attention. The F32 fault code is caused by a problem with the air system and is commonly found on Vaillant ecoMAX and ecoTEC boilers. It is essential to address the F32 fault code promptly to prevent further damage to the boiler.

Get in touch with a professional boiler repair company to quickly get your boiler back up and running.

Understanding the F32 Error Code

The F32 error code can be triggered by various issues, such as a blocked flue pipe, a leak, a fan failure, or a communication issue between the fan and the printed circuit board (PCB). The code is shown when there is a problem with the airflow, indicating an issue with the fan operation. When the fan fails to work correctly, it prevents waste gases from being removed, leading to a safety lockout of the boiler to prevent them from being expelled into your home. We will explore some of the potential causes in more detail.

The Causes

Although the fan inside a Vaillant boiler is typically a sturdy component, it is possible for them to fail. One of the possible causes of the fan’s failure is moisture damage from a leak that can damage the electronic components. As a result, this can cause a PCB communication error preventing the circuit board from functioning and resulting in your boiler shutting down as a safety precaution.

Another reason for the F32 fault code could be poor flue pipe installation, which can lead to a blocked flue that would cause the error code to appear. This issue would be noticeable in the months after a newly installed flue pipe, so if this is the case, get in touch with the installer and report the issue.

Signs and Symptoms

There are some early signs of a pending F32 code on your boiler, which may help you prevent the problem before it gets worse and causes damage to your central heating system.

Unexpected Boiler Lockouts

If your boiler has recently locked-out (turned itself off) but worked correctly after restarting, this could be a sign of a potential issue. Boilers only turn themselves off when there is an underlying cause. We always recommend contacting a Gas Safe registered engineer to diagnose the issue. Catching problems early can save you hundreds of pounds later down the line after severe damage has taken place.

Unusual noises

Has your boiler recently been making some unusual noises? For example, if your boiler has been making a grinding or squealing noise, you may have a jammed motor, or there could be damage to the fan bearings.

If your boiler has been making a whistling noise, chances are you have a blocked flue pipe. Blockages aren’t expensive repairs, but they are a serious issue. Contact an engineer to clear the blockage to free any debris and allow the air to be expelled safely.

Banging and clunking could be caused by the fan not operating correctly or by a loose component in the air system. Again, contact a Gas Safe engineer to investigate the issue and tell them about the noises you have witnessed.

Are you experiencing a different kind of noise from your boiler? Check our our article on strange boiler noises and how to fix them.

Consequences of Not Addressing the F32 Fault Code

An F32 code shouldn’t be taken lightly. The consequences of ignoring the issue can be significant. Failure to address the problem can lead to further damage to the fan, flue pipe or internal components, which can lead to a costly repair or the potential replacement of your boiler. In addition, the flue prevents harmful gasses from being expelled into your home, which can be extremely dangerous to you and your family.

In addition to the safety risks, a faulty fan or flue pipe will adversely impact the efficiency of your boiler, resulting in the boiler overworking and costing more to run. 

How to Prevent the F32 Fault Code

Prevention is always better and more cost-effective than cure. That’s why we strongly recommend having your boiler regularly serviced to prevent unexpected breakdowns before they happen. An annual service will ensure the components of your boiler, including the fan and flue pipe, are working efficiently and correctly.

The average cost of a boiler replacement varies between £2,500 and £3,000. However, this can vary considerably depending on the size of your home and where you’re based in the country. We recommend booking a boiler service with a Gas Safe registered engineer to improve the longevity and efficiency of your boiler.

Final thoughts

The F32 fault code is a common issue in Vaillant ecoTEC boilers and is caused by a problem with the air system. It is important to be aware of the signs and symptoms of the F32 fault code, including boiler lockouts, unusual noises, and inadequate heating. We strongly recommend regular servicing and maintenance by a Gas Safe engineer to prevent boiler failures before they happen. If you need help with the F32 error, contact Trades Team for a qualified professional to diagnose and repair the issue.

About the author

Trades Team are experts in Heating, Plumbing and Gas Services. We have 15 years of experience providing expert Boiler Repair and Boiler Servicing to homes and businesses across the Southeast. Learn more about Trades Team.

More Guides on Valliant Faults

• How to Reset a Vaillant Boiler
• How to Fix an F22 Fault on a Vaillant Boiler
• How to Fix an F75 Fault on a Vaillant Boiler