Why is my dryer’s control board malfunctioning?

Why is my dryer control board malfunctioning

If you are experiencing issues with your dryer’s control board, you may be wondering what could be causing the malfunction. There are several common causes of control board malfunctions, and recognizing the signs and potential solutions can help you troubleshoot the problem more effectively.

Some signs that indicate a malfunctioning control board include incorrect temperature readings, the dryer not starting or stopping when it should, or the control board display not functioning properly. Understanding what may be causing the malfunction can help you address the issue and get your dryer back up and running in no time.

In this section, we will delve into the reasons behind a malfunctioning control board. We will discuss common causes, signs of a malfunctioning control board, and potential solutions to address the issue.

Key Takeaways

  • Control board malfunctions can cause a range of issues with your dryer’s functioning.
  • Recognizing the signs of a malfunctioning control board can help you troubleshoot the problem effectively.
  • There are several common causes of control board malfunctions, which we will explore in this section.
  • Understanding the potential solutions to control board malfunctions can save you time and money on repairs or replacement.
  • Proper maintenance of your dryer can help prevent control board malfunctions and extend the life of your appliance.

What is a dryer control board? Understanding its definition and function

A dryer control board, also known as a circuit board or electronic control board, is a vital component of your dryer system. As the name suggests, it functions as the brain of the appliance, regulating and controlling various processes to ensure optimal performance and functionality.

The control board is responsible for monitoring multiple sensors that detect temperature, moisture, and other conditions. Based on the input received from these sensors, the board adjusts the dryer’s operations to suit the desired settings.

Additionally, the control board manages the timing and duration of heating cycles, airflow, and rotation of the drum, among other functions. Its primary purpose is to ensure that the dryer operates safely and efficiently while providing users with the convenience of customizable drying settings.

How does a dryer control board work?

A control board typically consists of a microprocessor, memory chips, and other electronic components that enable communication between the sensors, devices, and controls. When you set the drying cycle and other preferences on your dryer, the control board interprets the input signals and sends commands to the different parts of the appliance to perform the specified tasks.

The control board system is susceptible to damage or malfunction due to various reasons, which we will discuss in detail in the following sections.

Signs of a malfunctioning control board

Recognizing the signs of a malfunctioning control board is key to addressing the issue and avoiding further dryer issues. Here are some indicators that your dryer control board is likely malfunctioning:

  1. The dryer displays error codes that do not correspond to any problem with the machine’s other components.
  2. Some buttons on the dryer’s control panel do not function correctly, while others work only intermittently.
  3. The dryer’s timer does not work or operates inconsistently.
  4. There is no power going to the dryer at all, or the dryer operates without being initiated.
  5. The dryer produces unusual sounds while running, indicating an electrical issue.

These are just a few of the common indicators that the control board of your dryer is malfunctioning. It is crucial to seek professional assistance or troubleshoot the issue yourself to prevent further damage to your dryer.

Overheating as a cause of control board malfunction

One of the most common causes of control board failure in dryers is overheating. When a dryer overheats, it can cause damage to the control board, leading to malfunctioning and even complete failure of the appliance.

Overheating can occur due to various factors, including:

Causes of overheating Effects on the dryer
Blocked exhaust vent Reduced airflow in the dryer, leading to overheating
Malfunctioning thermostat Inability to regulate the temperature, leading to overheating
Worn-out heating element Inefficient heating, leads to longer drying times and overheating

If the dryer overheats, it is important to address the issue promptly to prevent further damage to the control board. One way to do this is by cleaning the exhaust vent regularly to ensure proper airflow. Additionally, it is crucial to replace any faulty components, such as the thermostat or heating element, as soon as possible.

Regular maintenance of the dryer can also help prevent overheating. This includes cleaning the lint trap after every use, checking the ventilation system for any blockages, and ensuring the dryer is not overloaded with clothes.

Ignoring the signs of an overheating dryer can have severe consequences, including control board failure. It is crucial to address the issue promptly to avoid costly repairs and potential safety hazards.

Power Surge and Its Impact on the Control Board

If your dryer’s control board is malfunctioning, a power surge could be the culprit. A power surge is a sudden increase in the electrical current flowing through your home’s wiring, which can damage electronic devices connected to the power supply.

Most dryers are equipped with surge protectors to minimize the risk of damage from power surges. However, these protectors may not always be sufficient to prevent control board damage.

When your dryer experiences a power surge, the electrical current may damage the control board’s delicate circuitry. This can cause the board to malfunction, affecting the dryer’s operation and potentially leading to more significant issues.

Protection Against Power Surges

To protect your dryer from power surges, you can take several precautions:

  • Use a surge protector: A surge protector can help protect your dryer and other electrical appliances from power surges. Ensure the surge protector’s capacity matches your dryer’s power needs.
  • Unplug when not in use: Unplugging your dryer when not in use can minimize the risk of power surges.
  • Check your electrical system: Have a licensed electrician check your home’s electrical system to ensure it is up to code and can handle the required electrical load.

By taking these steps, you can minimize the risk of damage to your dryer’s control board from power surges.

“When your dryer experiences a power surge, the electrical current may damage the control board’s delicate circuitry.”

If you suspect that your dryer’s control board has been damaged by a power surge, contact a professional dryer repair expert. They can assess the damage and determine the best course of action, whether it’s repairing or replacing the control board.

Now that we’ve explored the impact of power surges on control boards let’s dive into another common cause of control board malfunctions in section 6- Faulty wiring and its effect on the control board.

Faulty Wiring and Its Effect on Control Board Malfunction

Malfunctioning control boards in dryers can also be caused by faulty wiring, which can affect the proper functioning of the appliance. Electrical issues such as frayed or broken wires, loose connections, or damaged power cords can cause the control board to malfunction or fail altogether.

Signs of Wiring Issues

Signs of wiring issues that can lead to control board malfunction in your dryer include:

  • Intermittent power supply to the dryer
  • Inability to start the dryer
  • Dryer shutting down unexpectedly
  • Sparks or smoke coming from the dryer
  • Fuse or circuit breaker tripping frequently

When you notice any of these signs, it is essential to inspect the wiring and identify any potential issues.

Addressing Wiring Issues

If you suspect that faulty wiring is causing the control board to malfunction, it is essential to address the issue promptly to avoid further problems. Here are some steps you can take:

  1. Unplug the dryer from the power source.
  2. Check the power cord for any damage or wear and tear. If the power cord is damaged, replace it with a new one.
  3. Inspect the wiring connections in the dryer. Look for any loose or frayed wires and tighten or replace them as necessary.
  4. Check the circuit breaker or fuse box to ensure the circuit is not overloaded or tripped. Reset the breaker or fuse if necessary.
  5. If you are not confident in your ability to inspect and repair the wiring, call a professional appliance technician for assistance.

“Faulty wiring can cause control board malfunctions, affecting the proper functioning of your dryer. It is essential to address any wiring issues promptly to avoid further problems.”

User Error and Control Board Malfunction

While control board malfunctions can stem from various sources, user error is a common cause. Some of the most common user errors that can lead to control board issues include:

  1. Overloading the dryer: Overloading the dryer with clothes can put a strain on the control board, leading to burnout and eventual malfunction. To avoid this, ensure that you load your dryer according to the manufacturer’s instructions.
  2. Using the wrong settings: Using the wrong dryer settings can also cause control board issues. For instance, running the dryer at too high a temperature or using the wrong cycle can cause the board to overheat and fail. Make sure to use the appropriate settings for the load you are drying.
  3. Failure to clean the lint filter: Failure to clean the lint filter can cause blockages, which can disrupt the airflow and cause the control board to overheat and malfunction. To prevent this, clean the lint filter after every use.

If you suspect that your control board issues are a result of any of the above user errors, try troubleshooting the problem by addressing the root cause.

However, if the issue persists, it might be time to seek professional assistance. Avoid attempting to fix the control board yourself as this can cause further damage. Instead, call in a qualified appliance technician to assess and repair the problem.

Regular Maintenance to Prevent Control Board Malfunctions

Regular maintenance of your dryer is essential to ensure that the control board functions optimally. Neglecting your dryer’s maintenance can lead to control board malfunctions, resulting in costly repairs or replacements. By following these simple preventive measures, you can keep your dryer in excellent condition:

  • Clean the lint filter: Cleaning the lint filter after each cycle prevents lint buildup, improves airflow, and reduces the risk of overheating.
  • Inspect dryer vents: Check the dryer vent for blockages, damage, or leaks. Clogged or damaged vents restrict airflow, leading to overheating and potential control board damage.
  • Clean the dryer drum: Wipe the dryer drum with a damp cloth after each use to remove any residual detergent or fabric softener buildup.
  • Check door gaskets: Inspect the door gaskets for any damage or wear. Damaged or worn gaskets allow air to escape, making the dryer less efficient and increasing the risk of overheating.
  • Level the dryer: Make sure that your dryer sits level on the ground. An unlevelled dryer can cause unnecessary vibrations, leading to potential control board damage.

Regular maintenance not only prolongs the life of your dryer but also reduces the risk of control board malfunctions. Incorporating these preventive measures into your routine can save you time and money in the long run.

Replacing a malfunctioning control board

If your dryer’s control board is malfunctioning, you have two options – you can either call a professional repair service or attempt to replace the control board yourself.

If you have experience working with electrical appliances and feel confident in your abilities, you may be able to complete the replacement process yourself. However, if you are unsure or uncomfortable working with electronics, it is best to leave the job to a professional.

Professional repair services offer a range of benefits, including:

  • Expertise and experience in handling control board malfunctions
  • Access to the latest tools and equipment
  • Warranty on parts and labor
  • Assurance that the repair work is done safely and correctly

If you decide to go the DIY route, carefully read the manufacturer’s instructions and find a reliable source of information to guide you through the process step-by-step. Keep in mind that if you damage any other parts or make a mistake during the replacement, it can be costly to repair.

Professional Repair

If you opt for professional repair, take the following steps:

  1. Research and identify reputable repair services in your area.
  2. Compare pricing, warranties, and customer reviews before deciding on a service.
  3. Contact the repair service and schedule an appointment.
  4. Be prepared to provide information about your dryer’s model and the specific issues with your control board.
  5. Prepare your dryer for the repair technician’s arrival by providing easy access to the appliance and clearing the area around it.

During the appointment, the technician will diagnose the issue with your control board and provide a quote for the repair cost. If you agree to the pricing, the technician will proceed with the repair work. Once the repair is complete, the technician will test the dryer to ensure it is functioning correctly before leaving your home.

DIY Options

If you decide to replace the control board yourself, follow these steps:

  1. Turn off the power to your dryer by unplugging it from the electrical outlet or turning off the circuit breaker.
  2. Remove the dryer’s front panel, and locate the control board.
  3. Disconnect all wires and cables from the control board.
  4. Remove the screws or other fasteners securing the control board to the dryer’s housing.
  5. Install the new control board by reversing the previous steps.
  6. Reattach all wires and cables to the new control board.
  7. Replace the dryer’s front panel and turn the power back on.
  8. Test the dryer to ensure the new control board is functioning correctly.

Replacing a control board is not an easy task, and it is essential to follow all instructions carefully and take safety precautions. Ensure that you are using the correct replacement part that follows the manufacturer’s guidelines, or you may risk causing further damage to the dryer or injuring yourself.

In conclusion, while it is possible to replace a malfunctioning control board yourself, it is often best to seek professional assistance to ensure the job is done correctly and safely. If you do choose to go the DIY route, take all necessary precautions, closely follow all instructions, and stay alert to potential risks.

Troubleshooting Control Board Issues

If you are experiencing problems with your dryer’s control board, there are some steps you can take to troubleshoot the issue. The following are common problems you may encounter and how to go about fixing them:

  1. Control board not responding: If your control board is unresponsive, check that the dryer is properly plugged in and that the circuit breaker is not tripped. If the power supply is fine, check the control board’s wiring for any damage or loose connections. If any wires appear damaged, consider seeking professional assistance to avoid further damage.
  2. Dryer not heating: A lack of heat could indicate a malfunctioning control board or heating element. Use a multimeter to check if the heating element is functioning correctly. If it is, the issue may be with the control board, and a replacement may be necessary.
  3. Error codes: If your dryer is displaying an error code, refer to the manufacturer’s manual for troubleshooting tips. Sometimes, simply resetting the control board can resolve the issue.
  4. Buttons not working: If the buttons on the control board are not responding, try cleaning them with a damp cloth. If that doesn’t work, an electronic control board replacement may be necessary.

While these steps may help you identify and solve minor control board issues, more complex issues may require professional assistance. If you are unsure about any aspect of the troubleshooting process, seek help from a qualified appliance technician.

Remember, regular maintenance and care can help prevent control board issues from arising in the first place. Follow the manufacturer’s instructions for cleaning and maintaining your dryer, and keep an eye out for any signs of wear and tear.

Professional Assistance for Control Board Problems

While DIY solutions may solve some control board issues, certain malfunctions require professional repair services. If your dryer’s control board fails to operate correctly or continues to malfunction after following appropriate troubleshooting steps, it may be time to consult an appliance technician.

A professional technician will have the knowledge and skills necessary to diagnose and repair a faulty control board accurately. They can also recommend the best course of action, whether that means repairing the existing board or replacing it.

When selecting a repair service, consider factors such as the technician’s experience, price, and availability. Look for reviews and recommendations from other customers to ensure you choose a reputable company.

If you opt for professional assistance, be prepared to pay a higher fee than you would for DIY repairs. However, the cost of repairing or replacing a control board can vary significantly depending on the extent of the damage and the model of your dryer. It is always best to request a quote before proceeding with any repair work.

Remember, attempting to repair your control board yourself could lead to further damage or safety hazards. If you are unsure or uncomfortable with handling electrical components, it is better to seek the help of a professional.

“Don’t risk electrocution or further damage by trying to fix your dryer’s control board yourself. Call a professional technician for reliable, safe repairs.


In conclusion, a malfunctioning control board can cause several issues with your dryer, affecting its performance and lifespan. By understanding the common causes and signs of a malfunctioning control board, you can take appropriate action to troubleshoot and address the problem.

Regular maintenance and proper usage of your dryer can prevent control board malfunctions caused by overheating, power surges, faulty wiring, and user errors. If you do encounter control board issues, consulting a professional technician is advisable. They can diagnose the problem accurately and offer solutions, including control board replacement, if necessary.

For minor issues, you can try troubleshooting the control board on your own, using our step-by-step guide. Remember to follow safety precautions and avoid any actions that may cause further damage or harm.

By taking care of your dryer’s control board, you can ensure optimal performance, energy efficiency, and durability. We hope this article has provided valuable insights and guidance on how to address control board malfunctions, helping you keep your dryer running smoothly for years to come.

Max Appliance Repair

Written by Max | An appliance repair technician with more than 15 years experience in appliance repair services in Toronto and the GTA.

Disclaimer: This post "Why is my dryer’s control board malfunctioning?" is for information purposes only. If you need specific help, please contact Max Appliance Repair at https://maxfix.ca/contact/.