Sharp Microwave Error H99
⚡ Quick Answer: The Sharp Microwave error code H99 indicates a potential malfunction in the magnetron, which may lead to unusual buzzing sounds and failure to heat fo... ⚠️ Difficulty Varies
What Does Error H99 Mean?
The Sharp Microwave error code H99 indicates a potential malfunction in the magnetron, which may lead to unusual buzzing sounds and failure to heat food properly. If this error persists, it suggests an internal fault that may require professional service for diagnosis and repair.
Possible Causes
- Magnetron
- High Voltage Capacitor
- Control Board
How to Fix Error H99
DIY Fix Basic Initial Troubleshooting
- Turn off the microwave and unplug it from the power outlet.
- Wait at least 60 seconds and then plug it back in.
- Try operating the microwave again to see if the H99 error clears.
- If the error code persists after power cycling / unplugging.
- If the microwave fails to start, heats incorrectly, or shows additional error behavior.
- If there are unusual noises, smells of burning, or visible damage to the unit.
Next step
Choose the next step for H99
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
Capacitor
Stores electrical energy to assist in starting or running the motor efficiently.
- Typical part-only price
- $15 - $35
- DIY difficulty
- Easy
- Estimated time
- 10-20 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.
Microwave Magnetron
Generates microwave energy for heating food and requires high-voltage service procedures.
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.
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Technical Specifications
| wattage | 1000W |
|---|---|
| component | Magnetron |
| resistance | 0.5-1.5 ohms |
| part_number | R-21M-1 |
| voltage_rating | 120V AC |
Common Questions
What does H99 error mean on Sharp Microwave?
The H99 error on a Sharp Microwave indicates a malfunction in the magnetron, often leading to buzzing sounds and heating failure.
Can I fix Sharp Microwave H99 error myself?
You can attempt basic troubleshooting by unplugging the microwave for 60 seconds and then plugging it back in to see if the error clears.
How much does it cost to fix H99 error?
Repair costs for the H99 error can vary based on the model and region; consult a local technician for a precise estimate.
When should I call a technician for H99?
Call a technician if the error persists after power cycling, if the microwave fails to start or heat correctly, or if you notice unusual sounds or smells.
Data last verified: 2026-07-22
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