A dishwasher motor typically burns out from continuous electrical or mechanical strain, causing it to overheat. The most common causes are blockages in the pump, worn-out shaft seals, restricted water flow, and electrical issues like voltage surges or degraded wiring.
A faulty motor can result in poor cleaning or the unit failing to run. Replacing a motor is a complex job and requires disassembly and electrical expertise, so hiring a professional is best. To replace dishwasher pump motor parts can cost between $400-$600, with labor adding $150–$250.
Dishwasher pumps typically last 7 to 10 years. The lifespan depends on usage frequency, hard water mineral buildup, and maintenance. The two main types of pumps—circulation pumps and drain pumps—wear down naturally over time from exposure to food particles and detergents.
Disconnect the motor's two wire leads from the wiring harness. Set your multimeter to the R x 1 setting. Touch each of the meter's probes to one terminal each. Your motor should show little resistance (a reading of zero, or close to zero).
The average lifespan of a dishwasher is 9 to 12 years. However, premium brands properly maintained can last up to 15 years, while heavy use or hard water can cause models to break down in 7 to 8 years.
The most common dishwasher fault is clogged or poor drainage. This occurs when food debris, grease, or foreign objects (like broken glass or food particles) block the primary drain filter, the drain hose, or the garbage disposal connection, leaving dirty, standing water at the bottom of the unit.
Strange Noises During Operation
A dishwasher should operate relatively quietly. If you hear unusual grinding, squealing, or rattling sounds, it may point to: Worn-out bearings. Broken motor parts.
Some models require you to shut off the power to the dishwasher either by unplugging it or shutting off the circuit breaker. Others are reset by pressing and holding the Start/Reset button on the control panel, then waiting a few moments before attempting to start a wash cycle.
Replacing a dishwasher motor and pump assembly typically costs between $𝟑𝟓𝟎 and $𝟔𝟓𝟎 in total. This includes $𝟏𝟑𝟎 to $𝟑𝟎𝟎 for the part alone (since the motor and pump are usually sold as a single unit) and $𝟏𝟓𝟎 to $𝟐𝟓𝟎 for professional labor.
Early signs of a failing water pump include visible coolant leaks, a high-pitched whining or grinding noise from the front of the engine, a slow but steady drop in the coolant reservoir, and an engine temperature gauge that occasionally creeps higher than normal.
When the dishwasher fills with water but then nothing happens, and there's no humming or movement, it's highly likely that the motor has completely stopped functioning. This could be due to: Burnt-out motor windings. Faulty control board not signaling the motor.
> Federal efficiency standards transformed dishwashers into marathon cleaners. Modern machines take 2.5 to 4 hours per cycle—a far cry from the quick turnarounds families actually need.
If a more complicated problem such as a failed drain pump or defective electronic control board is preventing the dishwasher from draining, then you'll need to consider replacing it if your dishwasher is older than 7 years and the repair will cost more than ½ the price of installing a new dishwasher.
The control board or electronic control unit is typically the most expensive part in a dishwasher. It manages all the dishwasher's functions, such as the wash cycles, water temperature, and the timing of the washing and drying processes.
People put crumpled aluminum foil in the dishwasher primarily as a hack to make silver or stainless steel utensils and cutlery look shinier.
Dishwashers usually don't have a dedicated reset button on the control panel. You can reset your dishwasher by unplugging it from its power source for one minute and then plugging it back in.
To determine if your dishwasher motor is bad, listen for a humming or silent motor, check for poor cleaning/draining, or smell for burning odors. Use a multimeter to test for electrical continuity and verify the motor is getting power.
Most dishwashers do not have a dedicated "Reset" button. Instead, you can usually reset the machine by pressing and holding the Start or Cancel button for 3 to 5 seconds. Alternatively, you can reset it by cutting the power entirely (unplugging it or flipping the circuit breaker for one minute).
Is it cheaper to repair or replace a dishwasher? If the cost to repair exceeds 50% of the cost of a new one or your unit is over 8–10 years old, replacement is usually the smarter option.
Common Signs It's Time To Buy a New Dishwasher
If the pump completely fails: The dishwasher won't drain or clean properly. You might see standing water inside the machine. It could trigger an error code or safety lockout.
8 Highest Rated Dishwashers We Recommend
Service reports show that Bosch dishwashers have some of the lowest repair rates, especially in the first five years. Bosch's warranty covers the entire appliance for the first year, five years for electronics and racks, and lifetime on the door and tub.
Is Bosch or LG better for dishwashers? Both brands offer high-quality dishwashers, but Bosch is often preferred for its quiet operation, energy efficiency, and flexible interior design.