A dryer that suddenly refuses to start can be incredibly frustrating, especially when you’re in the middle of your laundry routine. You load the machine, close the door, press the button—and nothing happens. While this can be caused by a variety of mechanical or electrical issues, two of the most common culprits are problems with the electronics or the fuses. Understanding these components and how they function can help you troubleshoot the issue and decide whether it’s time to call a professional.

Start with the Basics

Before diving into complex diagnoses, it’s important to rule out some simple causes:

• Power supply – Ensure the dryer is plugged in securely. Sometimes plugs can come loose or be accidentally pulled out. 
• Circuit breaker – Check your home’s breaker box. A tripped breaker can cut off power to the dryer. 
• Door switch – Dryers will not operate if the door isn’t closed completely or the door switch is faulty. 

If these simple checks don’t solve the problem, it’s time to look deeper into the machine’s internal components—starting with the fuses and electronic control systems.

Blown Thermal Fuse

A thermal fuse is a safety device that prevents the dryer from overheating. It’s located on the blower housing or near the heating element. If your dryer overheats, the thermal fuse will blow, cutting off power to the motor or the entire machine to prevent fire hazards.

Symptoms of a blown thermal fuse:

• Dryer won’t start at all 
• No sound or lights when you press the start button 
• Drum won’t spin 

Once the thermal fuse is blown, it must be replaced. It cannot be reset. This issue typically occurs due to restricted airflow—most often from a clogged lint filter or a blocked exhaust vent. In such cases, replacing the fuse is only part of the solution. You’ll also need to address the airflow issue to prevent it from happening again.

Electronic Control Board Problems

Modern dryers often come with a control board that acts as the brain of the appliance. This board sends signals to different parts of the dryer, like the motor and the heating element. If the board fails, the dryer may not start or may display error codes.

Signs of a faulty control board include:

• Unresponsive buttons or display 
• Error messages on the screen 
• Dryer lights come on, but the machine won’t run 

Control board issues can be caused by electrical surges, manufacturing defects, or just wear and tear over time. Diagnosing this problem usually requires professional testing equipment and expertise.

Start Switch Failure

The start switch is what activates the motor when you press the button. If this switch is broken or faulty, the motor won’t start. You may hear a click or see lights, but the drum won’t turn.

This can be tested using a multimeter to determine if the switch is sending the correct signals. If it’s not, the part needs replacement.

Other Electrical Components to Consider

• Drive motor – If the motor has failed, the dryer won’t start even if the rest of the electronics are working. 
• Timer – On mechanical models, the timer can wear out or become stuck, preventing the machine from initiating a cycle. 
• Door latch sensor – If this sensor fails, the control board might incorrectly assume the door is open and refuse to start the cycle. 

Why Professional Diagnosis Matters

While some homeowners are comfortable with DIY repairs, electrical problems in appliances can be complex and even dangerous. Misdiagnosing the issue can lead to wasted money on unnecessary parts—or worse, create new problems.

That’s why calling a professional appliance technician is often the safest and most cost-effective option. A trained expert can quickly identify whether the issue is a blown fuse, a failed electronic component, or something else entirely.

Don’t Let a Broken Dryer Disrupt Your Routine

At Chula Vista Appliance Repair Company, we specialize in diagnosing and repairing dryers of all makes and models. Whether your issue is electrical, mechanical, or something in between, our experienced technicians are here to help. We provide fast, reliable, and affordable service so you can get back to your day without skipping a beat.

Don’t wait—contact us today to schedule your dryer repair appointment!

Contact us

(619) 880-5508