A dishwasher is a kitchen convenience that cuts down time spent with your hands in soapy water after meals, which is especially helpful if you have a large family or a healthy hosting calendar. But how long do dishwashers last, and when is it time for a new one? Like all appliances, dishwashers don’t last forever. They require routine cleaning and repairs from time to time.Survey data from our members’ experiences with more than 69,000 dishwashers reveals that about 23 percent of those dishwashers either broke or stopped working as well as they should have within five years of ownership.
The Average Lifespan of a Dishwasher
On average, a dishwasher lasts 9 to 12 years, with most sources citing a typical lifespan of around 10 years for a well-maintained unit used in a standard household. However, this range can vary significantly depending on several factors, such as brand quality, frequency of use, maintenance habits, and water quality. High-end brands like Miele claim their dishwashers can last up to 20 years with proper care, while budget models may start showing issues as early as 5 to 7 years. Consumer Reports, based on surveys of over 69,000 dishwashers, notes that about 23% of units experience breakdowns or reduced performance within the first five years, underscoring that longevity isn’t guaranteed without effort.
How Long Do Dishwashers Last?
Factors That Influence Dishwasher Longevity
Several key factors determine how long your dishwasher will last. Understanding these can help you make informed decisions about maintenance and replacement.
1. Brand and Build Quality
Not all dishwashers are created equal. Premium brands like Bosch, Thermador, Whirlpool, and Miele often use higher-quality materials, such as stainless steel interiors, durable motors, and advanced engineering, which contribute to longer lifespans. For example, Miele dishwashers are rigorously tested for 5,600 cycles, equivalent to 20 years of use at five cycles per week. In contrast, lower-cost models may use plastic components that wear out faster. Consumer Reports highlights Bosch, Thermador, and Whirlpool as some of the most reliable brands, with fewer breakdowns in the first five years.
2. Frequency of Use
How often you run your dishwasher plays a significant role. The average household runs about five cycles per week, according to the U.S. Energy Information Administration. If you use your dishwasher daily or multiple times a day, the wear and tear on components like the pump, motor, and seals will accelerate, potentially shortening its life to 6 to 8 years. Conversely, lighter use (e.g., once or twice a week) can extend the lifespan to 12 to 16 years. Moderation is key—running it too infrequently can also cause parts to seize up from lack of use.
3. Maintenance Practices
Regular maintenance is critical for maximizing your dishwasher’s lifespan. Neglecting simple tasks like cleaning the filter or door seals can lead to clogs, leaks, or reduced performance. For instance, food scraps left on dishes can clog the filter or damage the pump, while mineral buildup from hard water can affect efficiency. Manufacturers recommend cleaning the filter every month and running a cleaning cycle with vinegar or a dishwasher cleaner every three to six months.
4. Water Quality
Hard water, which contains high levels of minerals like calcium and magnesium, can cause limescale buildup in pipes, valves, and pumps, reducing efficiency and leading to premature failure. If your home has hard water, using a water softener or regularly descaling your dishwasher can make a big difference. Some dishwashers come with built-in water-softening systems that require periodic refilling with regeneration salt.
5. Loading Habits
How you load your dishwasher matters more than you might think. Overloading or improperly stacking dishes can strain the machine, block spray arms, and reduce cleaning effectiveness, forcing you to run additional cycles. This extra wear can shorten the lifespan. Always follow the manufacturer’s loading guidelines, ensuring items are spaced properly and the dirtiest sides face the spray arms.
Signs Your Dishwasher May Need Replacement
Even with proper care, dishwashers eventually show signs of aging. Here are some red flags that indicate it might be time to replace your unit rather than repair it:
- Decreased Cleaning Performance: If dishes consistently come out dirty or with residue despite troubleshooting (e.g., cleaning the filter or using rinse aid), the pump or spray arms may be failing.
- Visible Rust or Cracks: Rust on the interior tub or cracks in the door or body are serious issues that often make repair uneconomical. Replaceable parts like racks may be fixable, but tub damage is a dealbreaker.
- Persistent Leaks: Ongoing leaks, especially without an obvious cause like a worn door seal, can signal deeper issues with the pump or hoses. Left unaddressed, leaks can cause water damage to your kitchen.
- Unusual Noises: Loud banging, grinding, or humming sounds during cycles often indicate struggling components, such as a failing motor or pump.
- Dishes Not Drying Properly: If dishes come out cold or wet after the drying cycle, the heating element may be faulty. Replacing it can be costly, often making a new dishwasher more cost-effective.
- Frequent Repairs: If repair costs exceed half the price of a new dishwasher (typically $250–$2,000), replacement is usually the better option, especially for units over 8 years old.
Tips to Extend Your Dishwasher’s Lifespan
You have more control over your dishwasher’s longevity than you might think. Here are practical, expert-backed tips to keep it running smoothly for as long as possible:
- Read the Manual: Your dishwasher’s instruction manual is a treasure trove of model-specific advice. It covers proper loading, recommended detergents, and maintenance schedules. If you’ve lost the manual, check sites like Manualsonline.com or Manualslib.com.
- Scrape, Don’t Rinse: Most modern dishwashers don’t require pre-rinsing, but you should scrape off large food scraps, bones, or toothpicks to prevent clogs in the filter or damage to the pump.
- Clean the Filter Regularly: Unless your dishwasher has a self-cleaning filter, clean the manual filter every month or after heavy loads. Use a soft brush to remove food particles and rinse it thoroughly.
- Use the Right Detergent: Stick to dishwasher-specific powder or tablet detergents. Liquid dish soap or gel detergents with chlorine bleach can erode components over time. Avoid overfilling the soap dispenser.
- Run Hot Water Cycles: Hot water (130–140°F) dissolves grease and prevents buildup better than cold water, reducing strain on the machine.
- Clean Door Seals and Spray Arms: Wipe door seals with a soapy cloth or vinegar-soaked towel to remove debris and mold. Check spray arms for blockages every few months and clear them gently to maintain water flow.
- Use Vinegar or Dishwasher Cleaner: Run an empty cycle with a cup of white vinegar or a commercial cleaner like Affresh every three to six months to remove limescale and grease.
- Avoid Overloading: Follow the manufacturer’s loading guidelines to prevent strain on the motor and ensure proper cleaning. Overloading can also block spray arms, reducing efficiency.
- Schedule Professional Maintenance: For older units or if you notice issues, a professional technician can catch problems early. An extended warranty can also cover regular servicing.
- Balance Usage: Run your dishwasher regularly but not excessively. Occasional use keeps parts lubricated, while overuse accelerates wear. Aim for a full load every other day rather than multiple partial loads.
When to Repair vs. Replace
Deciding whether to repair or replace a dishwasher depends on its age, the cost of repairs, and its overall condition. As a rule of thumb, if repair costs exceed 50% of the price of a new dishwasher, replacement is often the better choice, especially for units over 8 years old. For example, replacing a heating element or pump can cost $300–$700, while a new mid-range dishwasher might cost $500–$1,000. Newer models also offer improved energy efficiency, quieter operation, and features like adjustable racks or soil sensors, which can save money in the long run.
However, if the dishwasher is relatively new (under 5 years) and the issue is minor (e.g., a $50 door seal replacement), repairing it can extend its life significantly. Always check if the unit is under warranty, as this can cover repair costs. Consult a trusted technician to assess whether the repair is worth it, and avoid low-quality parts that may cause further issues.
Choosing a New Dishwasher for Longevity
If replacement is on the horizon, prioritize durability when shopping. Look for:
- Reputable Brands: Bosch, Thermador, Whirlpool, and Miele consistently rank high for reliability. Miele’s 20-year claim is a standout, though it comes at a premium price.
- Stainless Steel Interiors: These are more durable than plastic and resist corrosion.
- Energy Efficiency: EnergyStar-certified models use less water and power, reducing strain on components.
- Warranty: Opt for models with at least a 5-year warranty, as short warranties (e.g., 1 year) often reflect lower confidence in durability.
- Features for Longevity: Look for soil sensors, self-cleaning filters, and efficient jets that reduce wear on the motor and pump.
Final Thoughts
A dishwasher’s lifespan of 9 to 12 years is a realistic benchmark, but with the right care, you can push it closer to 15 or even 20 years for high-end models. By understanding the factors that affect longevity—brand quality, usage, maintenance, and water conditions—you can take proactive steps to keep your dishwasher running smoothly. Regular cleaning, proper loading, and timely repairs are your best tools for avoiding premature replacement. When the time comes to upgrade, invest in a durable, energy-efficient model to maximize value. With a little effort, your dishwasher can remain a reliable kitchen companion for years to come.
FAQ
How do I know if my dishwasher is going bad?
To test what is wrong with your dishwasher, first, check that the power is on and the door is securely closed. Then run a cycle and observe whether the dishwasher is filling, draining, washing, and drying correctly. If any of these steps don’t occur, you may have a problem.
Do more expensive dishwashers last longer?
Generally, more expensive dishwashers tend to last longer due to higher quality components and better build quality. Brands like Bosch and KitchenAid, which are often pricier, are known for their durability and longevity. However, price alone doesn’t guarantee longevity.
Is it worth fixing a 3 year old dishwasher?
With dishwashers, the data typically leans toward replacement. They lose their value faster than you might realize, and professional repairs can be surprisingly expensive. The median repair cost is around $142, based on our surveys of more than 125,000 CR members.
At what age should a dishwasher be replaced?
On average, a well-maintained dishwasher can last between 10 to 15 years. What is the best brand of dishwasher to buy? There are many high-quality dishwasher brands on the market to fit different needs and preferences.
