Sharp Microwave: making noise

Professional Repair Guide

What is this symptom?

Is your Sharp microwave making unusual noises like buzzing, rattling, or grinding? These sounds may indicate issues with the turntable motor, cooling fan, or even the magnetron. Identifying the source of the noise is crucial to ensure your microwave operates safely and effectively.

Urgency: Medium

Important Tips for Sharp Models

Sharp microwaves commonly have blower fan, turntable motor, and magnetron issues as specific noise sources; noisy magnetron can indicate part nearing end of life.
High voltage capacitor faults in Sharp microwaves are noted causes of buzzing noise and should be checked before magnetron replacement.

Possible Causes

Turntable motor or support issues

How to Identify: Grinding, clicking or scraping noise when the turntable rotates; noise diminishes if turntable is removed.

Part: Turntable motor/drive coupler/roller guide

Cooling fan or blower issues

How to Identify: Rattling, whirring, or squealing noise that appears to come from back or side vents; may increase over time.

Part: Cooling fan/blower

Magnetron problems

How to Identify: Loud buzzing or humming not normal during operation; may coincide with reduced heating performance.

Part: Magnetron

High voltage diode or capacitor faults

How to Identify: Buzzing or humming noises combined with electrical anomalies; may co-occur with magnetron noise.

Part: High voltage diode/capacitor

Loose or worn internal components

How to Identify: Vibration or rattling that changes when unit is tapped gently; visible loose parts when panel removed.

Part: Internal screws/brackets

DIY Solutions

Clean turntable components

Easy 10-20 minutes

Tools Needed: none or damp cloth

Unplug microwave.
Remove turntable and roller ring.
Clean debris and ensure parts rotate smoothly.
Re-seat components correctly and test operation.

⚠️ Safety First: Always unplug before working inside microwave.

Inspect and clean cooling fan vents

Moderate 15-30 minutes

Tools Needed: screwdriver, compressed air

Unplug microwave and remove access panel.
Locate cooling fan near vents.
Clean dust and debris from fan blades and grill.
Reassemble and test if noise is reduced.

⚠️ Safety First: Ensure power is disconnected and be careful not to damage fan blades.

Professional Repairs

Replace turntable motor, roller guide, or drive coupler

Estimated Cost: $40 - $120

Replace cooling fan or blower assembly

Estimated Cost: $50 - $150

Replace magnetron or high-voltage components

Estimated Cost: $100 - $300+

When to Call a Professional

Noise persists after basic cleaning and inspection

Noise accompanied by reduced heating performance

Burning smell or sparks noted during operation

Noise originating from internal high-voltage components

Preventive Maintenance

Clean turntable and interior regularly: Debris-caused rattling and grinding noises
Frequency: weekly or after spills
Blow out vents and fan area: Dust buildup that leads to fan noise
Frequency: monthly

Frequently Asked Questions

Why is my Sharp Microwave making noise?

Common causes include turntable motor issues, cooling fan problems, and magnetron faults.

How do I fix Sharp Microwave making noise myself?

You can clean turntable components and inspect cooling fan vents for debris.

How much does it cost to fix making noise?

Professional repairs can range from $40 to over $300 depending on the issue.

When should I call a technician for making noise?

If the noise persists after DIY fixes or if it involves high-voltage components, call a technician.

References & Sources

Microwave Makes Loud or Unusual Noises: Expert Guide Community
Sharp How to Fix a Buzzing or Rattling Noise Official

Community Analytical Insights

Analysis based on real user discussions from appliance repair communities

Can I Fix This Myself?

50%

DIY Success Rate Difficulty: Either

Common Issues Reported by Users

Faulty turntable motor causing grinding or rattling noises.
Loose or damaged microwave components, such as the waveguide cover or fan.
Worn-out or defective high-voltage capacitor leading to buzzing sounds.

User Suggested Solutions

Inspect and replace the turntable motor if it's faulty. Unplug the microwave, remove the turntable, and access the motor underneath. Test the motor for functionality and replace if necessary.
Check for loose components by removing the microwave cover. Tighten any loose screws and replace damaged parts like the waveguide cover or fan. Ensure all components are securely fastened.
Test the high-voltage capacitor for defects. If buzzing is present, discharge the capacitor safely and replace it if found defective. This requires knowledge of electrical components.

Analysis based on 1 community discussions
View Sources

Data compiled from real discussions on r/appliancerepair and r/Appliances:

Repair or replace?

Community Discussions

noise

Consider replacing the microwave drawer with a new model, such as the XO microwave drawer.