Reignite Compressor Whirlpool WRF535SWH

What Makes the Whirlpool WRF535SWH Compressor Tick

The Whirlpool WRF535SWH is a popular French‑door refrigerator that balances sleek design with powerful cooling performance. At the heart of this unit lies a compressor, a motorized pump that circulates refrigerant through coils to remove heat from the interior. Over time, the compressor may lose its spark or simply fail to engage. When that happens, the fridge stalls, the interior temperature rises, and your food starts to spoil.

Reigniting a compressor is not a simple “turn‑on” task—it involves diagnosing why the compressor stalled, restoring power, and ensuring that all safety protocols are met. Below, we walk through every step from safety checks to the final restart, so you can bring your WRF535SWH back to life without calling a technician on the first try.

Understanding How the Compressor Works

The compressor’s job is to compress low‑pressure refrigerant gas into a high‑pressure vapor, which then cools in the condenser coils. Inside the WRF535SWH’s housing, the compressor is mounted on a base that also houses the high‑pressure oil and the electrical connections. When the refrigerator’s thermostat signals that the interior temperature has risen above the set point, an electrical relay engages, sending current to the compressor’s motor. The motor then turns the compressor’s piston or scroll assembly, pushing refrigerant through the system.

Because the compressor is a high‑pressure component, it is surrounded by thick steel and sealed with oil. This protects it from dust and moisture but also makes manual intervention difficult. The compressor’s internal parts are sealed, so any mechanical damage typically requires a replacement.

Common Reasons a Compressor May Not Ignite

Before attempting any repair, confirm which of these scenarios applies. The following sections provide a structured troubleshooting approach.

Safety First: Essential Precautions

• Unplug the Refrigerator: Always disconnect the unit from mains power before opening the back panel or touching any wiring.
• Avoid Direct Contact with the Compressor: The compressor’s oil can be hot, and the high‑pressure gas inside may be dangerous.
• Use a Grounded Work Area: Work on a stable surface and keep your hands away from the compressor housing.
• Have Proper Tools Ready: You’ll need a Phillips head screwdriver, a non‑contact voltage tester, and a set of wrenches for the refrigerant lines (if needed).

By following these precautions, you reduce the risk of injury and protect the appliance from further damage.

Step‑by‑Step Guide to Reignite the Compressor

1. Verify Power Supply

1. Check the Outlet
   Use a voltage tester to confirm that the outlet is delivering 120 V. If the outlet is dead, reset the circuit breaker or replace the fuse.

2. Inspect the Power Cord
   Look for frayed insulation or exposed wires. Replace the cord if any damage is visible.

2. Locate the Compressor and the Relay

1. Open the Back Panel
   Remove the screws holding the rear panel and gently lift it.
2. Identify the Compressor
   It is a cylindrical metal block with a heavy base.
3. Find the Compressor Relay
   The relay sits beside the compressor; it’s a small square box with three terminals.

3. Test the Relay and Wiring

1. Test for Voltage at the Relay Terminals
   With the fridge unplugged, check that the power line (usually the first terminal) is not live. Then, reconnect the power and confirm 120 V at the relay’s input.
2. Check the Relay Output
   When the thermostat signals “on,” a quick click should occur. Listen for the relay’s audible click and check that the output terminal receives voltage.
3. Inspect Wiring
   Look for any loose connectors or cracked insulation. Tighten screws and replace damaged wires.

4. Examine the Compressor’s Internal Wiring

1. Inspect the Start Capacitor
   The capacitor is a small, round component on the compressor housing. A blown capacitor will prevent the compressor from starting. Use a multimeter to check for continuity.
2. Check the Compressor Motor
   Look for a strong smell of burnt insulation. A bad motor winding will need replacement.

5. Verify Refrigerant Levels

1. Look for Leaks
   Inspect the refrigerant lines for dents or frost buildup.
2. Measure Pressure
   Use a gauge set to read the low‑side and high‑side pressures. For the WRF535SWH, the low side should be between 55–70 psi and the high side between 165–185 psi.
3. Re‑charge If Needed
   If the pressure is low, you will need to add refrigerant. This is best left to a licensed technician because handling refrigerant requires certification and safety measures.

6. Clean the Compressor and Condenser Coils

1. Remove Dust
   Use a brush or vacuum to clean the condenser coils on the back of the unit.
2. Inspect the Compressor Oil
   If the compressor has an oil leak, the oil may be contaminated, causing startup failure. This typically signals a compressor replacement is required.

7. Reignite the Compressor

1. Plug the Refrigerator Back In
   Once all checks are complete, reconnect the power cord.
2. Set the Thermostat
   Ensure the thermostat is set to a reasonable temperature (typically 37–40 °F for the fridge compartment).
3. Watch for the Compressor Click
   When the thermostat signals “cool,” the relay should click and the compressor should start moving. Listen for the continuous whirring of the compressor.
4. Monitor Temperature
   Use an external thermometer to verify that the interior cools to the set point within 2–3 hours.

If the compressor still does not ignite, the issue likely lies with the motor or the internal electronics, and replacement may be necessary.

When the DIY Approach Falls Short

Even with meticulous troubleshooting, some problems exceed the scope of a home repair. Recognize when to seek professional help:

• Refrigerant Handling: Only licensed technicians should add or evacuate refrigerant.
• Compressor Replacement: This requires specialized tools and a new compressor that matches the exact specifications.
• Electrical Faults: Complex wiring or control board issues are best handled by a qualified electrician.

Calling a professional saves time and prevents accidental damage to the unit or injury.

Preventive Maintenance Tips

Keep the Condenser Clean

Dust accumulation can reduce cooling efficiency and strain the compressor. Clean the condenser coils every 6 months or more often in dusty environments.

Check Door Seals

Leaky door gaskets allow warm air in, forcing the compressor to work harder. Replace seals that show cracks or are warped.

Monitor Temperature Settings

Avoid setting the fridge too cold; the compressor will cycle more often, shortening its lifespan. Stick to the manufacturer’s recommended temperature range.

Schedule Annual Service

Having a professional inspect your fridge annually can catch minor issues—like loose screws or minor refrigerant leaks—before they become major problems.

Summary

Reigniting the compressor on a Whirlpool WRF535SWH involves a systematic approach: ensuring power, testing the relay and compressor wiring, checking refrigerant levels, cleaning the compressor and coils, and finally restarting the unit. Safety precautions—unplugging the fridge, avoiding direct contact with the compressor, and using proper tools—are non‑negotiable. When in doubt, especially with refrigerant or motor replacement, it’s wise to contact a certified technician.

By following these steps, you can often restore your refrigerator’s cooling function without a costly repair, preserving your food and extending the life of your appliance.