Cove Dishwasher Not Draining: 7 Fixes To Stop Any Spills

If your Cove dishwasher isn’t draining, the possible culprits are a jammed garbage disposal, dirty sink air gap, neglected filter, blocked drain hose, messed up drain pump, gunked-up pressure sensor, or installation hiccups like a misaligned drain hose. These snags slow water flow, causing drainage issues. A cleanup or some adjustments can usually fix the issues.

In this post, I’ll break down what might be causing the fuss and how to fix it. Keep reading to get all the details.

Why Is Cove Dishwasher Not Draining?

If you’re grappling with a Cove dishwasher refusing to drain, pinpointing the issue is key. 

Before we start, it’s worth noting that Sub Zero mentions that water underneath the filters in the sump area is normal. If you’re seeing this, it might not be a drainage problem.

Now, let’s cut to the chase on why this might be happening:

Reason 1: Clogged Garbage Disposal

If your garbage disposal is jammed, it’s likely because food bits, grease, or other gunk have built up over time. 

This mess creates a roadblock, making it tough for water to smoothly escape from your dishwasher.

Reason 2: Dirty or Clogged Sink Air Gap

The sink air gap becomes dirty or clogged when soap scum, food particles, or other residues build up. 

This accumulation is often a result of regular use and insufficient cleaning. 

With the air gap is compromised, water struggles to make its way out, leaving you with unwanted pooling in the dishwasher.

Reason 3: Filter Needs Cleaning

Neglecting regular maintenance leads to a dirty dishwasher filter. 

Overuse without proper cleaning allows detergent residue, and other stuff to gather, hindering water flow during the drainage process.

Reason 4: Drain Hose Obstruction

Obstructions in the drain hose can occur due to the accumulation of debris, foreign objects, or improper installation. 

This can happen over time or during the initial setup of the dishwasher.

See also  How To Clean Dishwasher Drain Hose Without Removing It?

Reason 5: Drain Pump Malfunction

When the drain pump gives up, it’s often because of electrical issues, or simply worn down. 

Over time, these parts lose their efficiency, making the pump struggle to expel water properly.

Reason 6: Clogged Pressure Sensor

A clogged pressure sensor is the result of a gradual buildup of detergent residue, minerals, and contaminants. 

This accumulation interferes with the sensor’s ability to accurately gauge water flow, leading to drainage issues.

Reason 7: Incorrect Installation

The bad drainage could be because your Cove dishwasher wasn’t set up right. 

Things like not getting it level, having bits inside not lining up, or not connecting everything tight can mess with the draining game. 

Even a blocked vent from a wonky installation can throw a wrench in the works.

How To Fix A Cove Dishwasher That Won’t Drain?

Now, let’s talk about some of the ways you can take care of these issues.

Solution 1: Cleaning Up The Garbage Disposal

  1. Turn off the dishwasher and the garbage disposal unit.
  2. Refer to your dishwasher’s user guide for specific instructions on locating and accessing the drain hose and garbage disposal connection.
  3. Using a towel, clean any visible debris around the garbage disposal’s entrance.
  4. After clearing visible debris, run a generous amount of cold water through the disposal to help flush out any remaining particles or loosened material.
  5. If available, locate the reset button on the garbage disposal unit. 
  6. Press the reset button to ensure the disposal is back to its default state.
  7. Turn on the dishwasher and check if the drainage issue persists. If it does, move on to the next fix.

Solution 2: Cleaning The Air Gap

  1. Locate the air gap near the sink.
  2. Remove the air gap cover and check for debris. 
  3. Clean it using a sponge or brush.
  4. Use a toothbrush to clean the small air gap ports.
  5. Run water through the air gap to ensure it’s clear.
  6. Turn on the dishwasher and observe if the drainage improves.
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Solution 3: Clean The Filter

  1. Locate and remove the filter.
  2. Rinse the filter under running water to remove debris.
  3. Use a brush to clean any stubborn debris, ensuring the filter is free of clogs.
  4. Reinstall the filter and run the dishwasher to check if the drainage has improved.
Note: Sub Zero suggests a specific method to clean a Cove Dishwasher filter. I’ve just provided a gist of the process here.

Solution 4: Fix The Drain Hose

  1. Turn off the dishwasher and disconnect the drain hose from both the dishwasher and the sink or garbage disposal.
  2. Inspect the entire length of the drain hose for any bends, kinks, or visible damage. 
  3. Straighten out any bends and replace the hose if damaged.
  4. Use a flashlight to peek into both ends of the hose, checking for debris. 
  5. If present, use a flexible plumbing snake or a long thin brush to dislodge and remove the obstruction.
  6. Flush the hose with a mixture of water and vinegar to clear any remaining debris or build-up.
  7. Reconnect the drain hose securely to both the dishwasher and the sink or garbage disposal.
  8. Run a short cycle to ensure proper drainage.

Solution 5: Fix The Drain Pump

  1. Turn off the dishwasher and locate the drain pump.
  2. Access the drain pump and check for any visible obstructions. 
  3. Use needle-nose pliers to remove any debris that may be hindering the impeller.
  4. Manually spin the impeller to ensure it moves freely. 
  5. If there’s resistance or the impeller feels stuck, the pump may need replacement.
  6. Inspect the pump’s electrical connections. 
  7. If there are signs of corrosion or damage, you should call in an expert for repair or replacement.
  8. Reassemble the dishwasher and run a cycle to confirm that the drain pump is functioning properly.
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Solution 6:Clear Up The Pressure Sensor

  1. Locate the pressure sensor, a small tube connected to the dishwasher’s water heater.
  2. Carefully disconnect it, ensuring the dishwasher is powered off.
  3. Examine the sensor for any visible debris or mineral buildup. Use a toothbrush or a soft brush to gently clean the sensor.
  4. Check the tubing connected to the pressure sensor for clogs. If present, use compressed air to blow out any obstructions.
  5. Reconnect the pressure sensor securely, ensuring all connections are tight.
  6. Power on the dishwasher and run a cycle to see if the drainage issue is resolved.
Note: Due to the location of this sensor, I would say you’d be better off calling in a more experienced technician to troubleshoot, just to avoid any extra damage.

Solution 7: Proper Installation

In the end, if none of that works, your dishwasher was probably doomed from the start – you’ve probably had it installed incorrectly. Let’s talk about how you can fix that. 

  1. Turn off the Cove dishwasher and disconnect it from the power source.
  2. Check the manual’s pictures to align the bits inside. Take them apart if needed, put them back properly, and tighten them up.
  3. Secure the connections.
  4. Shine a light and peek at the vent if your dishwasher has any. Make sure the flapper moves well and think about adding a deflector.
  5. Use a digital level to make sure your dishwasher is sitting right. Adjust the feet with pliers or a wrench.
  6. Stick some pads under the feet to stop the dishwasher from dancing around.
  7. Load it up with dishes and run a cycle to catch any sneaky drainage problems.


What does code 800140 mean on a Cove dishwasher?

Cove Dishwasher Code 800140 shows up when the dishwasher drain pump has been on for too long and can’t get rid of water properly.

Final Thoughts

Now you know the drill. 

These specific issues can turn your Cove dishwasher into a mini swimming pool. Keep an eye on them, fix what needs fixing, and bid farewell to standing water hassles. 

Good luck with getting your dish-cleaning back on track and getting off of floor cleaning because of spills!

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