If a refrigerator comes with a built-in stabilizer, it is designed to handle voltage fluctuations and protect the appliance from power surges and drops. In such cases, you may not need to buy an external stabilizer. The built-in stabilizer should be sufficient to safeguard the refrigerator's compressor and other electrical components within the specified voltage range.
However, it's essential to check the specifications and user manual of the refrigerator to confirm if it indeed has a built-in stabilizer and the acceptable voltage range it can handle. Some refrigerators may have basic voltage protection, while others may offer advanced protection features.
If you live in an area with frequent or severe voltage fluctuations, it's always a good idea to ensure your refrigerator is adequately protected. In such cases, you might want to consider using an external voltage stabilizer for added protection, even if the refrigerator comes with a built-in one. The external stabilizer can provide an extra layer of safety and help prolong the lifespan of your appliance by ensuring it operates within a stable voltage range.
Ultimately, the decision to use an external stabilizer depends on the specific circumstances in your location, the features of your refrigerator, and your preference for added protection. If in doubt, consult the refrigerator's manufacturer or a qualified electrician for guidance based on your specific situation.