Start Capacitor Parts

Microwave won't heat? A faulty capacitor often causes no heating or weak performance. This high-voltage capacitor restores full power. Moderate DIY.

If your microwave runs but won't heat, a failed magnetron capacitor may be the cause. This high-voltage component stores energy for the magnetron.

A fan motor run capacitor that helps the appliance fan start and maintain smooth operation. Replacing a failed capacitor restores proper airflow and can help recover normal cooling performance when the original part wears out. What it does:

• Provides the phase shift and stored energy needed for the fan motor to start and run reliably.
• Common symptoms of a failing capacitor: fan not starting, fan humming or running intermittently, reduced airflow, or poor cooling performance.
• Used where a dedicated run capacitor is required for the appliance fan motor.
• Does not include installation tools or wiring harnesses.

• Disconnect power to the appliance before servicing to avoid electrical shock.
• Capacitors can hold a charge; discharge safely before touching terminals or disconnecting wires.
• Note terminal wiring positions (take a photo) to ensure correct reconnection.

Refrigerator won't cool or compressor won't start? This overload protector prevents compressor damage from electrical surges. Simple 15-minute fix.

If your microwave won't heat food or makes buzzing sounds, the high voltage capacitor may have failed. This part stores electrical energy for the magnetron.

This capacitor stores and releases electrical energy to help the refrigerator's compressor start and run smoothly. Replacing a weak or failed capacitor can restore reliable compressor startup and more consistent cooling performance.

• Provides the electrical boost/phase shift needed for compressor motor startup and steady operation
• Works with the start device to deliver proper current to the compressor
• Failure symptoms can include clicking or humming near the compressor, poor cooling, or short cycling
• May cause the compressor not to start after power interruptions when weak or failed

• Disconnect power before servicing any electrical component
• Safely discharge the capacitor before handling; avoid touching terminals
• Note wire positions and terminal markings; transfer leads one at a time to the matching terminals
• Secure the capacitor in its mounting/bracket to prevent vibration damage

Microwave not heating or making unusual sounds? The high voltage capacitor stores energy for the magnetron. DIY repair with proper discharge safety.

Refrigerator not cooling or compressor not running? This relay overload protector prevents compressor damage by cutting power during overload conditions.

Fix an air conditioner that won't turn on or off with this control switch. Direct replacement part restores reliable operation. Standard difficulty repair.

Refrigerator won't start or runs continuously? This PTC thermistor start relay controls compressor startup by increasing resistance as it heats up.