A dishwasher is an essential appliance in most households, saving time and effort by automating the dishwashing process. However, when a dishwasher stops draining, it can be a frustrating experience that leaves you with a pool of dirty water and a pile of unwashed dishes. In this article, we’ll guide you through the steps to identify the cause of the issue, provide potential solutions, and preventative measures to ensure your dishwasher remains in top working condition.
Understanding Dishwasher Drainage
Before diving into troubleshooting, it’s essential to understand how dishwashers drain and the reasons behind potential issues. Some dishwasher models require a small amount of water to remain at the bottom of the tub after a cycle to keep the pump module moist and prevent the seal from drying out. If your dishwasher is designed this way, a small amount of water left behind is normal and not a cause for concern. However, if the water level is higher than the pump module, it indicates a drainage issue.
Pre-Service Checks
Before contacting a professional to service your dishwasher, there are a few checks you can perform to diagnose and potentially resolve the issue.
Check Door Latch
Ensure that the dishwasher door is securely shut and latched. A dishwasher will not drain if the door is not properly closed.
Cancel/Drain Button
Most dishwashers have a cancel/drain button. Press this button to see if you can manually initiate a drain cycle to empty the dishwasher.
Inspect Drain Hose
Turn off the water supply and disconnect the drain hose. Check for any obstructions or kinks in the hose that could be causing the problem. Ensure that the hose is less than 12 feet long for optimal efficiency.
Drain Hose Loop
If the loop of the drain hose is more than 20 inches off the floor, it can cause drainage problems. Disconnect the hose, reloop it closer to the floor, and reconnect it.
Check for Faults
Examine the drain hose for any visible faults or damage that could be causing the issue.
Possible Causes of Drainage Issues
There are several reasons a dishwasher may not be draining properly. Here are some possible causes and their solutions:
Clogged Filter
A clogged filter can prevent water from draining out of the dishwasher. Remove and clean the filter according to the manufacturer’s instructions.
Drain Pump Failure
A faulty drain pump can cause the dishwasher to stop draining. If you suspect the pump is the issue, it’s best to consult a professional to diagnose and replace the faulty component.
Blocked Garbage Disposer
If your dishwasher is connected to a garbage disposer, ensure that the disposer is not clogged. Run the disposer to clear any potential blockages.
Air Gap Blockage
If your dishwasher has an air gap, it can become blocked and prevent proper drainage. Remove the air gap cover and clean any debris or buildup inside.
Faulty Timer or Control Board
A malfunctioning timer or control board can prevent the dishwasher from completing the drain cycle. If you suspect this is the issue, consult a professional for diagnosis and repair.
Preventative Maintenance
Regular maintenance and servicing can help prevent drainage issues and keep your dishwasher running smoothly. Here are some tips to ensure your dishwasher remains in top working condition:
Regularly Clean the Filter
Check and clean the dishwasher filter regularly to prevent clogs and drainage issues.
Run a Cleaning Cycle
Run a dishwasher cleaning cycle with a dishwasher cleaner to help remove buildup and improve drainage.
Inspect Seals and Gaskets
Regularly inspect the seals and gaskets around the dishwasher door and pump module for signs of wear or damage. Replace them as needed to prevent leaks and drainage issues.
Schedule Professional Maintenance
Schedule regular professional maintenance to ensure your dishwasher operates at peak performance and to identify and resolve potential issues before they become significant problems.
When to Call a Professional
While some drainage issues can be resolved with simple troubleshooting and maintenance, others may require the expertise of a professional appliance technician. If you’ve exhausted the troubleshooting steps outlined in this article and your dishwasher still isn’t draining, it’s time to call in the professionals for a proper diagnosis and repair.
Conclusion
A dishwasher that stops draining can be an inconvenience, but understanding the potential causes and troubleshooting steps can help you resolve the issue quickly and efficiently. By performing regular maintenance and addressing issues early, you can prolong the life of your dishwasher and ensure it remains a valuable time-saving appliance in your home.
For more handy Pre-Service Checks page.
To book in a service, visit our Appliance Servicing page.
