How to Fix a Dishwasher Leaking Water
Last updated: 30 September 2026
Check the door seal, check the hoses, check the drain pump, and check the detergent dispenser.
Overview
A dishwasher leaking water can cause damage to your kitchen. This guide covers diagnosing and fixing the leak.
Step-by-Step Fix
Before beginning any repair, ensure you have isolated power or water supplies. Clear your workspace, gather standard hand tools, and wear appropriate personal protective equipment (PPE).
- First turn off the dishwasher at the mains power switch and turn off the water supply at the isolation valve. Place a towel under the dishwasher to catch any water. Do not attempt to work on the dishwasher with the power on.
- Identify where the water is leaking from. Common leak points include the door seal the inlet hose connection the drain hose and the drain pump. Dry the area and observe where water reappears.
- Check the door seal. The rubber gasket around the door can become worn or damaged. Clean the seal with a damp cloth to remove any food debris. If the seal is cracked or torn replace it with a new one.
- Check the inlet hose connection at the back of the dishwasher. Tighten the connection if it is loose. Check the rubber washer inside the connection and replace if worn. Apply PTFE tape to the threads for extra sealing.
- Check the drain hose for cracks or damage. The drain hose connects the dishwasher to the sink waste. Look for kinks or blockages. If the hose is damaged it must be replaced.
- Check the drain pump. The drain pump is located at the bottom of the dishwasher. Remove the filter and inspect the pump for debris. Clean any debris from the pump. If the pump is damaged it will need to be replaced.
- Check the detergent dispenser. If the dispenser is cracked or the seals are worn water can leak from the door during the wash cycle. Replace the dispenser if it is damaged.
- Reassemble the dishwasher and turn the water supply back on. Plug the dishwasher into the mains power. Run a short cycle to test for leaks. If the leak persists call a qualified appliance technician.
- To prevent future leaks clean the filter regularly. Check the door seal monthly. Do not overload the dishwasher. Use the correct amount of detergent.
- If the leak is significant or you cannot identify the source call a qualified appliance technician. Water damage from a dishwasher leak can be expensive to repair if left untreated.
Common Symptoms & Diagnostic Resolutions
Review the common error codes and operating symptoms below to quickly identify the root cause of the fault before ordering replacement parts.
| Symptom / Code | Likely Root Cause | Recommended Resolution |
|---|---|---|
| Leak from door | Damaged door seal or detergent dispenser | Clean or replace the door seal. Check the detergent dispenser for cracks. |
| Leak from under dishwasher | Loose hose connection or damaged hose | Tighten the hose connections. Replace any damaged hoses. |
| Leak only during drain | Drain pump or drain hose issue | Check the drain pump for debris. Check the drain hose for blockages or damage. |
| Water pooling inside door | Detergent dispenser leaking | Replace the detergent dispenser. Check the seals around the dispenser. |
Frequently Asked Questions
Why is my dishwasher leaking water?
A damaged door seal a loose hose connection a cracked drain hose or a faulty drain pump are the most common causes. Check each area to identify the leak.
Can I fix a leaking dishwasher myself?
Yes for most cases. Checking and replacing the door seal tightening hose connections and cleaning the drain pump are DIY-friendly tasks. If the pump is faulty call a technician.
How often should I clean the dishwasher filter?
Clean the dishwasher filter monthly to prevent blockages. If you use the dishwasher daily clean the filter every two weeks. A clean filter reduces the risk of leaks.
When should I call a technician for a leaking dishwasher?
Call a technician if you cannot identify the source of the leak if the leak is significant or if the drain pump is faulty. Water damage can be costly if the leak is not fixed promptly.