Maytag Dishwasher Making Loud Buzzing Noise (Troubleshooting Guide)

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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

A loud buzzing noise in your Maytag dishwasher is often caused by a faulty water inlet valve or motor issues. Turn off the power, check for clogs, and test the valve for proper operation.

Confirm the symptom

Buzzing noise during fill cycle
Noise stops when power is off
Water not heating properly

Tools and prep

Screwdriver set
Multimeter
Plumber's putty
Work gloves
Turn off power at circuit breaker
Turn off water supply

Step-by-step troubleshooting

Check Water Inlet Valve
Do: Locate the water inlet valve at the back of the dishwasher. Inspect for mineral buildup or debris.
Observe: Clogged valve or damaged solenoid.
Means: Clogged valve causing noise and poor water flow.
Next: Clean the valve or replace if damaged.
Test Water Inlet Valve
Do: Set multimeter to continuity mode. Test the valve's terminals for continuity.
Observe: No continuity indicates a faulty valve.
Means: Valve is not receiving power or is defective.
Next: Replace the water inlet valve.
Inspect Motor and Pump
Do: Remove the lower dish rack and access panel. Check the motor and pump for obstructions or damage.
Observe: Foreign objects or worn motor components.
Means: Motor or pump issue causing buzzing noise.
Next: Clear obstructions or replace damaged parts.
Check Heating Element
Do: Visually inspect the heating element for cracks or corrosion.
Observe: Damaged heating element.
Means: Faulty heating element causing electrical noise.
Next: Replace the heating element if damaged.
Test Control Board
Do: Inspect the control board for burn marks or loose connections.
Observe: Burned components or disconnected wires.
Means: Control board malfunction affecting motor or valve.
Next: Replace the control board if damaged.
Verify Water Pressure
Do: Check the home's water pressure using a pressure gauge.
Observe: Low water pressure below 20 psi.
Means: Insufficient water pressure causing valve to buzz.
Next: Adjust or install a pressure regulator if needed.
Clean Dishwasher Interior
Do: Run a vinegar cycle to remove mineral deposits and debris.
Observe: Reduced noise after cleaning.
Means: Mineral buildup was causing the noise.
Next: Regular maintenance to prevent future buildup.

Common causes

Cause	Likelihood	Difficulty	Part often needed
Faulty Water Inlet Valve Mineral buildup or electrical failure prevents proper water flow, causing buzzing.	Common	Easy–Medium	Water Inlet Valve
Clogged Motor or Pump Debris or food particles block the motor or pump, causing strain and noise.	Sometimes	Medium	Pump Motor
Damaged Heating Element Cracks or corrosion on the heating element can create electrical noise.	Rare	Medium	Heating Element
Control Board Failure Malfunctioning control board sends incorrect signals to motor or valve.	Sometimes	Hard	Control Board
Low Water Pressure Insufficient water pressure causes the inlet valve to struggle, creating a buzzing sound.	Sometimes	Easy	Pressure Regulator
Mineral Deposits Hard water buildup restricts water flow and causes noise during operation.	Common	Easy	Descaling Solution

Parts matching

Common parts needed for a Maytag dishwasher making a loud buzzing noise include:

Water Inlet Valve
Pump Motor
Heating Element
Control Board
Descaling Solution
Pressure Regulator

Purchase OEM parts for compatibility and reliability.

When to call a professional

Buzzing persists after replacing the water inlet valve and cleaning the pump.
You notice electrical burning smells or sparks.
Control board shows visible damage or error codes.
Noise is accompanied by water leakage or flooding.
You're uncomfortable working with electrical components.

FAQ

Can a loud buzzing noise damage my dishwasher?

Yes, prolonged buzzing from a faulty valve or motor can lead to more serious electrical or mechanical failures if not addressed.

How often should I clean my dishwasher to prevent noise?

Run a vinegar or descaling cycle every 1–2 months to prevent mineral buildup and maintain quiet operation.

Is it safe to use third-party replacement parts?

Third-party parts can work, but ensure they are compatible and meet manufacturer specifications to avoid further issues.

Why does the noise only happen during the fill cycle?

A buzzing noise during the fill cycle typically points to a problem with the water inlet valve or low water pressure.

Can I fix the buzzing noise without turning off the power?

No, always turn off the power at the circuit breaker before troubleshooting to avoid electrical hazards.