Why Is My Chatsworth Dishwasher Not Draining?

Clogged Drains, Faulty Parts, and What You Can Do Next

Standing Water in the Bottom of Your Dishwasher?

It’s one of the most common issues we hear from Chatsworth homeowners: “Why is there water left in the bottom of my dishwasher?” If your dishwasher isn’t draining, it doesn’t necessarily mean it’s broken—but it does need attention. Below are the most likely causes and how you can troubleshoot the problem before reaching out for professional support.

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Common Causes of Dishwasher Drainage Problems

Clogged Filter

Most dishwashers have a removable filter that traps food debris. If it gets clogged, water can’t drain properly. Remove and rinse the filter thoroughly, then replace it securely.

Blocked or Kinked Drain Hose

The drain hose connects your dishwasher to the sink’s drainage system. If it’s pinched, blocked, or clogged, water can’t flow out. Check behind or beneath the unit for bends or obstructions.

Garbage Disposal Backflow

If your dishwasher shares a drain line with a garbage disposal, a clogged or recently installed disposal unit might block drainage. Make sure the knockout plug in a new disposal has been removed.

Failed Drain Pump

The drain pump forces water out during the drain cycle. If it’s burned out, clogged with debris, or not receiving power, it won’t function. This issue typically requires professional testing and replacement.

Faulty Check Valve

This one-way valve prevents water from re-entering the dishwasher after draining. If it’s stuck closed or damaged, water may remain in the basin.

Timer or Control Board Issues

If your appliance uses a mechanical timer or digital control board to manage cycles, it may fail to trigger the drain cycle. Signs include cycles ending too early or no pump noise during draining.

How to Safely Troubleshoot

  • Start by turning off power to the unit at the breaker box.
  • Remove the lower rack and inspect the bottom of the tub for food or debris buildup.
  • Clean the filter and check the drain area for obstructions.
  • If accessible, inspect the drain hose for kinks or clogs.
  • Do not attempt to disassemble pumps or electrical components unless trained to do so.

When to Call for Professional Assistance

If cleaning the filter and checking the hose doesn’t solve the issue—or if you notice electrical issues, error codes, or strange noises—then it’s time for expert help. Drain pump failure, valve issues, or wiring problems are best diagnosed by a trained technician.

Call (818) 867-8259 now for dishwasher repair assistance in Chatsworth. We’ll help you take the next step with confidence and care.