Defrost Not Working? You Might Just Need This Sensor

Defrost Not Working? You Might Just Need This Sensor

Don’t Replace the Whole Fridge—Just This Simple Fix

If your freezer is building up frost or your refrigerator section feels warmer than usual, you might assume the entire appliance is going bad. But before you spend thousands on a new fridge, there’s one small component that could be causing big problems: the defrost sensor.

❄️ What Is a Defrost Sensor?

The defrost sensor—also known as a defrost thermostat or temperature sensor—plays a key role in keeping your freezer frost-free. It monitors the evaporator coil’s temperature and tells your fridge when it’s time to activate the defrost heater.

Without this part working properly, the heater may never kick on, leading to:

  • Thick ice buildup in the freezer

  • Warm temperatures in the fridge compartment

  • A constantly running fan or compressor

  • Unusual clicking or buzzing noises

🛠️ Signs the Defrost Sensor Has Failed

Here are some telltale signs that your defrost sensor might be the issue:

  • Freezer is cold but packed with frost

  • Fridge is warm despite a working compressor

  • You hear the fan running but no air is circulating properly

  • Manually defrosting helps—temporarily

These are classic symptoms of a failed or faulty sensor.

🔧 Replacing the Sensor Is Easier Than You Think

In many cases, swapping out the defrost sensor is a quick, affordable repair. It’s a small part, and in most models, it’s accessible without removing the entire back panel.

Common brands that use defrost sensors include:

  • Whirlpool

  • Samsung

  • LG

  • Frigidaire

  • GE

At PRS Parts Inc., we stock genuine and aftermarket defrost sensors for all major models.

📍Why Buy Local?

Ordering from mainland suppliers can delay your repair by days—or weeks. But here in Hawaii, you need a fix now. That’s why PRS Parts Inc. keeps commonly needed defrost sensors in stock on Oʻahu, ready for pickup or local delivery.

✅ Final Tip

Before replacing the sensor, make sure you’ve ruled out other issues like:

  • Blown defrost heater

  • Malfunctioning control board

  • Faulty fan motor

Still not sure? Bring your model number into PRS Parts Inc., and our team will help you troubleshoot.

Visit PRS Parts Inc. at 540 Lagoon Dr.

Get the part your refrigerator actually needs—fast, local, and accurate. Your fridge isn’t broken. It just needs the right sensor.

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