Dishwasher Not Spraying (Troubleshooting Guide)

On this page

Quick answer
Confirm the symptom
Tools and prep
Step-by-step troubleshooting
Common causes table
Parts matching
When to call a pro
FAQ
Related guides

Quick answer

If your dishwasher isn't spraying water, first check for clogged nozzles and filters. Ensure the water supply is on and the pump is working. Clean or replace parts as needed.

Confirm the symptom

Dishes not getting clean
No water visible during cycle
Water not reaching upper rack
Spray arms not spinning
Hearing water but no spray

Tools and prep

Screwdriver
Soft brush or toothbrush
Clean cloth
Bucket (optional)
Flashlight
Work gloves
Turn off power at circuit breaker
Shut off water supply if needed

Step-by-step troubleshooting

Check Water Supply
Do: Ensure the home's water supply valve is fully open.
Observe: Water pressure is normal and valve is open.
Means: Water supply is not the issue.
Next: Check spray nozzles
Check Spray Nozzles
Do: Remove and clean spray arm nozzles with a soft brush and water.
Observe: Nozzles are clear of debris and water flows freely.
Means: Clogged nozzles were the problem.
Next: Test dishwasher
Inspect Spray Arms
Do: Look for cracks or blockages in the spray arms.
Observe: Spray arms are intact and rotating freely.
Means: Spray arms are functioning properly.
Next: Check pump
Check Pump
Do: Listen for the pump running during a cycle. Check for unusual noises.
Observe: Pump is operating normally without strange sounds.
Means: Pump is likely not the issue.
Next: Inspect filter
Inspect Filter
Do: Clean the dishwasher's filter according to the manual.
Observe: Filter is free of debris and water flows through it.
Means: Clogged filter was the issue.
Next: Test dishwasher
Test Dishwasher
Do: Run a short cycle to see if water sprays properly.
Observe: Water sprays evenly and reaches all dishes.
Means: Issue is resolved.
Next: Done
Check Float Switch
Do: Ensure the float switch isn't stuck or blocked.
Observe: Float moves freely and resets properly.
Means: Float switch is not causing the issue.
Next: Inspect pump motor
Inspect Pump Motor
Do: Check for signs of damage or overheating on the pump motor.
Observe: Motor appears intact and operational.
Means: Pump motor is functioning.
Next: Consult a professional

Common causes

Cause	Likelihood	Difficulty	Part often needed
Clogged Nozzles Food particles or minerals block water flow.	Common	Easy	No
Clogged Filter Debris in the filter restricts water flow.	Common	Easy	No
Faulty Water Supply Low water pressure or closed valve.	Sometimes	Easy	No
Broken Spray Arm Cracks or blockages prevent proper spraying.	Sometimes	Easy–Medium	Spray arm
Faulty Pump Pump motor or impeller not working.	Sometimes	Medium	Pump assembly
Faulty Float Switch Stuck float prevents water from entering.	Rare	Easy	Float switch
Faulty Control Board Malfunctioning board may not activate pump.	Rare	Hard	Control board
Low Water Inlet Valve Valve not opening to allow water in.	Rare	Medium	Inlet valve

Parts matching

If you need parts, look for these components based on your model:

Spray arms (often labeled as upper/lower)
Dishwasher pump assembly
Water inlet valve
Float switch assembly
Control board (rarely needed)

Take the old part to the store or note the model number for accurate replacements.

When to call a professional

No water flow after cleaning all components
Pump makes loud noises or doesn't run at all
Dishwasher leaks water excessively
Error codes appear on the display
You suspect electrical issues or control board failure
You're unsure about disassembling internal components

FAQ

Can I use vinegar to clean the nozzles?

Yes, vinegar can help dissolve mineral deposits. Soak nozzles in a vinegar bath for 15–30 minutes before scrubbing.

How often should I clean the filter?

Clean the filter every 1–2 months for regular use to prevent clogs.

Why is the spray arm not spinning?

A clogged nozzle or a broken spray arm can prevent spinning. Clean nozzles first; replace the arm if damaged.

What if the pump is making noise but not spraying?

The pump impeller may be clogged or damaged. Turn off power and check for blockages or consider replacing the pump.

Can low water pressure affect the dishwasher?

Yes, low pressure can reduce spray effectiveness. Check your home's water pressure and ensure the supply valve is fully open.