Sharp Microwave: making noise
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.
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
- Unplug microwave.
- Remove turntable and roller ring.
- Clean debris and ensure parts rotate smoothly.
- Re-seat components correctly and test operation.
Inspect and clean cooling fan vents
- 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.
Next step
Choose the next step for making noise
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Microwave Turntable Motor
Rotates the microwave turntable through the drive coupler beneath the cavity floor.
- Typical part-only price
- $20 - $70
- DIY difficulty
- Medium
- Estimated time
- 30-60 mins
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Cooling Fan Motor
Moves cooling air around hot cooking components and electronic controls.
Microwave Magnetron
Generates microwave energy for heating food and requires high-voltage service procedures.
Capacitor
Stores electrical energy to assist in starting or running the motor efficiently.
Model-compatible Microwave parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
Professional Repairs
Replace turntable motor, roller guide, or drive coupler
Replace cooling fan or blower assembly
Replace magnetron or high-voltage components
When to Call a Professional
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?
How do I fix Sharp Microwave making noise myself?
How much does it cost to fix making noise?
When should I call a technician for making noise?
References & Sources
Community Analytical Insights
Guidance from available sources; statistical claims are shown only for samples of at least 10 discussions
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.
Limited-source guidance; percentages and success-rate claims are not shown
View
Sources
Data compiled from real discussions on r/appliancerepair and r/Appliances:
Community Discussions
noise
Consider replacing the microwave drawer with a new model, such as the XO microwave drawer.
Source: Reddit r/appliancerepair
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