If your microwave is not heating consistently and requires the discharge of the magnetron capacitor to restore functionality, it suggests that there may be an issue with the internal components of the microwave. Here are a few possible reasons for this problem:
Faulty capacitor: The magnetron capacitor in a microwave stores high voltage electrical energy and releases it to power the magnetron, which generates the microwaves for heating. If the capacitor is defective or damaged, it may not retain the necessary charge to consistently power the magnetron, resulting in intermittent heating or no heating at all.
Weak power supply: The power supply of the microwave provides the necessary voltage to operate the magnetron and other components. If the power supply is faulty or weak, it may not consistently deliver the required voltage, leading to inconsistent heating performance.
Faulty magnetron: The magnetron is the component responsible for generating the microwaves that heat the food. If the magnetron is faulty or worn out, it may not function properly, causing intermittent or no heating.
Control circuitry issues: The control circuitry of the microwave controls various functions, including power levels and timing. If there is a malfunction in the control circuitry, it may disrupt the heating process.
It's important to note that microwave ovens contain high voltages, even when unplugged, which can be dangerous. Working on the internal components of a microwave should only be done by qualified technicians to ensure safety.
If you're experiencing this issue with your microwave, I recommend contacting a professional appliance repair service or the manufacturer's customer support for assistance. They will have the expertise to diagnose and resolve the specific problem with your microwave.