A washing machine is one of the most frequently used appliances in any household, but when it starts to cause electrical problems like power surges, it’s a sign of a serious issue that needs immediate attention. Power surges can trip circuit breakers, damage other connected appliances, and even pose safety risks such as electrical fires. Two common causes of this problem are faulty wiring and a damaged control board. Understanding these issues can help you identify warning signs early and protect both your washer and home.

How a Washing Machine Can Cause Power Surges

A power surge occurs when there is a sudden increase in the electrical current flowing through your home’s wiring. Normally, appliances are designed to handle a specific voltage range, but when there’s a spike, it can overload sensitive components inside the washer. If your washing machine is causing the lights to flicker, circuit breakers to trip, or other devices to malfunction when it’s running, this often indicates an internal electrical problem rather than an issue with your home’s wiring.

1. Faulty Wiring Inside the Washer

The internal wiring of your washer is responsible for distributing power safely to all components — the motor, heating element, control board, and sensors. Over time, these wires can become damaged due to wear, vibration, or exposure to moisture. When insulation breaks down or connections loosen, short circuits may occur, leading to sudden surges of electricity. Common signs of faulty wiring include:

• Burning smell or visible scorch marks near the power cord or plug.
• Intermittent power loss during operation.
• Washer turning off unexpectedly or refusing to start.
• Circuit breakers tripping when the washer begins its cycle. 

Faulty wiring is not just an inconvenience — it’s a serious safety hazard. Even a small short circuit can cause sparks, overheating, or fire. Attempting to repair internal wiring without proper training is risky, as modern washers have complex electrical systems.

2. Damaged or Malfunctioning Control Board

The control board (or main PCB) acts as the brain of your washing machine. It regulates voltage and coordinates functions such as motor speed, water levels, and spin cycles. When this board is damaged, it can send incorrect voltage signals to the components, leading to erratic operation or power surges. Possible causes of control board damage include:

• Voltage fluctuations from your power supply.
• Moisture intrusion or corrosion on the board
• Overheating caused by poor ventilation or internal faults.
• Age-related wear or manufacturing defects. 

A failing control board may exhibit symptoms such as error codes on the display, cycles that stop mid-operation, or irregular power consumption. In severe cases, it may draw excessive current, creating surges that affect other appliances in the circuit.

How to Diagnose the Problem

Before assuming the worst, you can take a few steps to narrow down the cause of the issue:

1. Check your home’s electrical circuit. Ensure that the outlet and circuit used for the washer are not overloaded. Each large appliance should ideally have a dedicated circuit.
2. Inspect the power cord and plug. Look for signs of damage or overheating. If the cord feels warm or has discoloration, it may be the source of the surge.
3. Observe the timing of the surges. If the power surge happens at specific moments (for example, when the motor starts spinning), this suggests an internal wiring or control issue.
4. Avoid DIY electrical work. Unless you are qualified, it’s best not to open the washer yourself. The control board and wiring require professional tools and testing equipment to diagnose safely. 

Professional Repair and Prevention

When dealing with electrical issues, the safest approach is to contact experienced appliance repair technicians. They can test the wiring, inspect the control board, and determine whether components need replacement or repair. Professional repair services can:

• Identify whether the surge originates from the washer or your home’s electrical system.
• Replace damaged wiring and connectors.
• Repair or replace the control board if necessary.
• Ensure your washer is properly grounded to prevent future surges. 

In addition, technicians can recommend protective measures, such as installing surge protectors or voltage stabilizers to safeguard your appliances from external power fluctuations.

Preventive Tips

To reduce the risk of power surges caused by your washing machine, follow these guidelines:

• Always plug your washer into a grounded outlet, not an extension cord.
• Schedule regular maintenance to check wiring integrity and control functions.
• Keep the area around your washer dry to avoid moisture damage to electrical parts.
• Use a surge protector designed for large appliances. 

A washing machine that causes power surges is not a problem to ignore. What seems like a minor inconvenience could escalate into major damage or safety risks if left unattended. By addressing the issue promptly, you can ensure your appliance operates safely and efficiently for years to come. If your washer is causing power surges or showing any electrical problems, don’t wait until it damages your home’s electrical system. Contact San Diego Appliance Repair Service today. Our certified technicians will diagnose the problem quickly and restore your washer’s safe operation. Call us now or schedule an appointment online for expert and reliable service.   Contact us (619) 719-5005   [email protected]