A bad dishwasher drain pump typically makes a loud buzzing, humming, or grinding noise. It can also produce a high-pitched whine or a sharp rattling sound, often accompanied by pooled water at the bottom of the tub or a drainage-related error code.
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.
Issues like leaks, poor drainage, unclean dishes, foul odors and overall appliance operation, though infrequent, can be the most common problems with a dishwasher that isn't operating properly. In some cases, you can resolve these issues with a little elbow grease and the help of your product manual.
The average cost to fix a pump is around $150, with a range of $100 to $350. To troubleshoot, check for a clogged filter or faulty motor.
CALL THE PROS. A dishwasher that won't drain can leave standing water in the bottom of the appliance, create foul odors, and lead to costly repairs if left unchecked.
On average, you can expect a quality, professionally installed sump pump to last for approximately 7 to 10 years.
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. Popular brands include Café, Bosch, GE, Beko, Cove, KitchenAid, and Whirlpool to name a few.
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.
There may be a few reasons why your dishwasher won't drain. The most common source of clogs often comes from a blockage in the dishwasher's filter. Or, you may have an issue with your dishwasher's air gap, drain valve, drain hose or even your garbage disposal, causing your dishwasher to clog.
Another common symptom of a failing drain pump is unusual or loud noises coming from the washing machine, especially during the draining or spin cycle. The pump may be clogged, or there could be a problem with its motor, causing it to make grinding or buzzing noises.
If it is over ten years old, it might be time for a new one. When you factor in the energy efficiency of a newer machine, you may be saving yourself some money in the long run. However, if your machine is under six years old, then a repair might be the most cost-effective option.
Clogged Filter or Drain Basket
The most common reason for drainage issues is a clogged filter. Your dishwasher's filter catches food particles, grease, and debris to prevent them from clogging the drain pump. Over time, this buildup can become so thick that water can't pass through.
Different cycle phases produce different dishwasher noises: wash and spray phases often create a steady swish or whoosh, while drain and pump phases typically produce a soft hum and occasional gurgle.
As soap is rinsed off your body, it reacts with minerals in the water, such as calcium and magnesium, to form soap scum. This soap scum can stick to the sides of your pipes, creating a sticky, stubborn residue, and eventually, a clogged drain.
Chemical reactions: Aluminum in the foil oxidizes with the detergents in the dishwasher soap. This oxidation helps to remove tarnish stains on your silverware. 'This reaction boosts the overall effectiveness of the washing process,' says Jasmine Peterson, nutritionist and writer at Next Luxury.
Note: For fire safety reasons, only run appliances like dishwashers while you're home, and try to avoid running them when you're sleeping. If you're not a night owl, consider running the machine early in the morning before you go to work to still snag the cost savings.
Built-up residue, cloudy glassware, or food particles stuck on plates after a cycle often signal that internal components might be failing. Before deciding to replace, try cleaning your dishwasher thoroughly and running a cycle with a dishwasher cleaner.
Expert Picks: The Most Reliable Dishwasher Models. The average cost to replace a dishwasher will depend on the model you choose. You can expect to pay between $300 and $1500 for a new appliance.
Even with good care, these parts will eventually need to be replaced. Less expensive dishwashers usually last about 7 to 9 years. Higher-quality models that are well cared for can last 10 to 12 years. After about 10 years, you will likely see more problems and need more repairs.
If your drain pump is working properly, the multimeter should show a reading of between 160 and 260. If the reading is too high, too low, or if there's no reading at all, it means the drain pump is faulty and needs to be replaced with a new one.
5 Warning Signs Your Water Pump May Be Failing
Fixing a dishwasher not draining can cost $50–$150 while replacing a drain pump typically ranges from $150–$400, including parts and labor. If multiple components are failing, a new dishwasher might save you more money.