Though a dishwasher that’s slow to drain or leaves water behind likely has a draining problem, the cause isn’t always as clear. Why is there standing water in my dishwasher? A clogged drain hose prevents water from draining, causing it to back up into the dishwasher. Troubleshoot a Whirlpool dishwasher not draining with these common causes and solutions.

How to Fix a Whirlpool Dishwasher Not Draining

Clogs and part malfunctions are often responsible for a Whirlpool dishwasher not draining. We’ll pinpoint how to determine the source of draining problems and whether a DIY fix or professional repair is warranted.

Whirlpool Dishwasher Filter is Clogged

When your dishwasher doesn’t drain, a clogged filter is often the cause. The dishwasher’s filter is located above the drain pump, capturing food particles and debris to prevent them from clogging the pump. However, when the filter becomes clogged, water can’t pass through to be pumped and drained away, leaving puddles behind. You’ll also notice your dishwasher is not cleaning dishes as well, allowing remnants and residue to remain.

Follow these steps to clean a Whirlpool dishwasher filter and improve draining:

  1. Remove the bottom dish rack and locate the filter. Most are under the bottom spray arm or in the rear corner of the tub.
  2. Turn the upper filter counterclockwise and lift up to remove it with the lower filter.
  3. Separate and rinse both filters under running water, using a soft-bristle brush and dish soap to remove stubborn debris.
  4. Replace the lower filter by lining it up with the tabs in the filter housing. Fit the upper filter into the lower filter’s opening and turn clockwise until it locks in place.

Though a dishwasher that’s slow to drain or leaves water behind likely has a draining problem, the cause isn’t always as clear. Why is there standing water in my dishwasher? A clogged drain hose prevents water from draining, causing it to back up into the dishwasher. Troubleshoot a Whirlpool dishwasher not draining with these common causes and solutions.

whirlpool dishwasher not draining

Clogged Drain Hose

Drain hose clogs can also be responsible for a Whirlpool dishwasher not draining. This thin, flexible hose transports used dishwasher water from the drain pump to the sink or disposal drain. However, it can be subject to clogs from debris and food particles, causing water to back up into the dishwasher after draining. The drain hose could also be kinked, preventing the water from draining.

Most drain hose clogs are found near their connection at the garbage disposal, sink drain or dishwasher drain pump. Take a look at your user manual to find out how to remove the hose from each one of your model’s connections. Carefully remove any visible clogs with tweezers, pliers, or a straightened wire hanger. If the clog isn’t reachable, the drain hose must be replaced.

Defective Drain Valve

The drain valve opens and closes during a wash cycle, allowing water to exit the dishwasher via the drain pump. Water not draining from the dishwasher may be due to a defective valve stuck in the closed position. The valve can also become clogged with debris, preventing it from properly opening and closing.

Most drain valves are found behind the dishwasher’s front kickplate, near the motor. Inspect the check valve by removing the drain hose, then make sure that it opens and closes as it should. Remove any visible debris that may be impairing its function. If you still find your Whirlpool dishwasher not draining and the valve fails multimeter testing with a lack of continuity, it must be replaced.

Check Garbage Disposal

If there is a clog in the garbage disposal, it can prevent a dishwasher from draining. Try using water and vinegar to wash away any stuck food particles. Next, run cold water through the drain for ten seconds.

Clean the Air Gap

An air gap minimizes the risk of dirty water backing up into your dishwasher. If an air gap is clogged, the dishwasher won’t drain. If you have an air gap, it may be next to your faucet on your sink or under your sink. Pull straight up on the air gap to remove the top and clean out any debris.

Drain Pump Malfunction

If the above components are functioning correctly, draining issues may be due to a Whirlpool dishwasher drain pump not working correctly. The pump uses impellers powered by an electrical motor to flush used dishwasher water out of the tub and into the drain hose. If the impellers break or the pump motor lacks continuity with multimeter testing, a professional service should replace the pump assembly.

How to Prevent Dishwasher Clogs

You can prevent performance issues such as a dishwasher that won’t drain by performing routine maintenance:

  • Run the dishwasher often & always use the correct detergent.
  • Opt for the hot water cycle.
  • Scrape off any stuck-on food from dishes before loading them.
  • Clean the inside and outside of the dishwasher.
  • Routinely check the dishwasher filter and clean it as necessary.

The professionals at Mid America Service can accomplish any Whirlpool dishwasher repair. Schedule your expert service today! Our team is available 24/7 for all your appliance repair needs.