Overvoltage Woes: Is Your Dishwasher at Risk?

Dishwashers have become indispensable appliances in modern households, saving time and effort in our daily chores.

However, electrical appliances are vulnerable to various risks, and one such concern is overvoltage.

When a dishwasher is exposed to overvoltage, it can cause severe damage to its electrical components, control boards, and even pose a risk of electrical fires

In this article, we will explore the effects of overvoltage on dishwashers, signs of damage to look out for, preventive measures, and steps to take if overvoltage occurs.

Understanding Overvoltage

Overvoltage refers to an excessive surge in the electrical supply beyond the standard voltage level. It can be caused by lightning strikes, power grid fluctuations, faulty wiring, or equipment failure.

These spikes in voltage can have detrimental effects on delicate electronic components within appliances.

Effects of Overvoltage on Dishwashers

  1. Potential Damage to Electrical Components: Overvoltage can cause irreparable damage to the electrical components of a dishwasher, such as the motor, control board, heating elements, and sensors. These components are designed to operate within a specific voltage range, and when exposed to overvoltage, they can malfunction or even burn out.
  2. Impact on Control Boards: The control board, the brain of the dishwasher, is particularly susceptible to overvoltage. Excessive voltage can cause the control board to fail, leading to erratic functioning or complete shutdown of the dishwasher.
  3. Risk of Electrical Fires: Overvoltage increases the risk of electrical fires. When the electrical system of a dishwasher is subjected to a surge, the excess energy can generate heat, potentially igniting nearby materials or causing internal wiring to melt. This poses a significant safety hazard in your home.

Signs of Overvoltage Damage in Dishwashers

  1. Malfunctioning or Non-Responsive Controls: If your dishwasher’s controls become unresponsive, erratic, or display error codes after a power surge, it could indicate overvoltage damage.
  2. Burnt or Melted Wiring: Visually inspect the wiring of your dishwasher. Burnt or melted wires are a clear sign of overvoltage damage and should be addressed immediately.
  3. Unusual Noises or Odors: Overvoltage can cause the motor or other components to produce strange noises or emit burning odors. These indications should not be ignored as they may suggest damage caused by electrical surges.
  4. Tripping Circuit Breakers: If your dishwasher consistently trips the circuit breaker, it could be due to overvoltage damage. The excessive electrical load caused by the surge may exceed the breaker’s capacity.

Read also my article: Power Surge? No Problem! How to Safely Shield Your Dishwasher.

Preventing Overvoltage Damage

  1. Surge Protectors and Voltage Regulators: Installing surge protectors or voltage regulators specifically designed for appliances like dishwashers can help mitigate the effects of overvoltage. These devices divert excess voltage away from your dishwasher, safeguarding its sensitive components.
  2. Whole-House Surge Protection: Consider investing in whole-house surge protection systems. These systems protect all electrical appliances in your home, including your dishwasher, from power surges originating from external sources.
  3. Regular Electrical Inspections: Schedule periodic electrical inspections by a qualified electrician to ensure your home’s electrical system is in good condition. They can identify potential wiring issues or other vulnerabilities that could lead to overvoltage.
  4. Unplugging During Electrical Storms: During thunderstorms, it is wise to unplug your dishwasher and other valuable electronic devices. Lightning strikes and electrical surges induced by storms can cause significant damage to appliances.

What to Do if Overvoltage Occurs

  1. Disconnecting the Dishwasher: In the event of overvoltage, immediately disconnect the dishwasher from the power source by unplugging it or turning off the circuit breaker.
  2. Inspecting for Visible Damage: Carefully examine the dishwasher for any visible signs of damage, such as burnt wiring or melted components. Do not attempt to repair the damage yourself.
  3. Consulting a Professional: Contact a professional appliance repair technician or an electrician to assess the extent of the damage and carry out the necessary repairs. They have the expertise to safely handle electrical repairs and ensure your dishwasher is restored to proper working condition.

Insurance Coverage for Overvoltage Damage

  1. Homeowners’ Insurance Policies: Check your homeowners’ insurance policy to see if it covers damages caused by overvoltage. Some policies may offer coverage for appliance damage resulting from electrical surges.
  2. Reviewing Policy Coverage: Carefully review the terms and conditions of your insurance policy. It may specify coverage limits, deductibles, and any exclusions related to overvoltage damage.
  3. Filing a Claim: If your dishwasher sustains overvoltage damage, document the incident, take photographs of the damage, and file a claim with your insurance provider. Provide all necessary documentation and cooperate with the claims process to ensure a smooth resolution.


Overvoltage poses a real risk to your dishwasher’s electrical system and can lead to costly repairs or replacements.

By understanding the effects of overvoltage, recognizing signs of damage, taking preventive measures, and knowing how to respond if overvoltage occurs, you can protect your dishwasher and enhance its lifespan.

Stay vigilant, invest in protection devices, and consult professionals to ensure the longevity and safety of your dishwasher.