Refrigerator Compressor Won't Start – Causes, Fixes & Replacement Parts

Refrigerator Compressor Won't Start – Causes, Fixes & Replacement Parts

Is your refrigerator compressor not starting? Without a running compressor, your fridge can't cool and your food will spoil. Whether your compressor won't start at all, makes clicking sounds but doesn't run, or starts briefly then shuts off, most compressor starting problems can be fixed with a simple part replacement.

✓ Common Causes of Compressor Not Starting

1. Faulty Overload Relay Protector

The overload relay protector is a safety device that protects the compressor from electrical overload and overheating. When it fails, you'll hear clicking sounds from the back of the fridge but no cooling, or the compressor tries to start but fails repeatedly.

Common Part: DA35-00043U Samsung Refrigerator Overload Relay Protector

2. Bad Start Relay

The start relay provides the initial electrical boost needed to start the compressor motor. Test the relay by shaking it – if it rattles, the internal contacts are broken and it needs replacement.

3. Defective Start Capacitor

Some refrigerators use a start capacitor to provide extra starting power to the compressor. When it fails, the compressor hums loudly but doesn't run, or the circuit breaker trips when the compressor tries to start.

4. Seized or Failed Compressor

The compressor itself can fail mechanically. This is an expensive repair ($400-$800 including labor) and often not cost-effective for older refrigerators.

Replacement Compressors: W11628587 Whirlpool Refrigerator Compressor · WPW10750849 Whirlpool Refrigerator Compressor · W11480426 Whirlpool Refrigerator Compressor

5. Faulty Thermostat or Temperature Control

The thermostat signals the compressor to start when cooling is needed. If it fails, the compressor won't start even though the fridge is warm.

✓ How to Diagnose Which Part You Need

  1. Listen for Sounds - Clicking = relay failing. Humming = compressor getting power but can't start. No sound = thermostat or electrical problem
  2. Test the Overload Relay - Test with a multimeter for continuity. No continuity = faulty
  3. Test the Start Relay - Shake it. If it rattles, it needs replacement
  4. Check the Compressor - Test compressor windings with a multimeter between the three terminals
  5. Verify Voltage - Check the outlet voltage (should be 110-120V AC)

✓ Find Your Compressor Parts

We stock Overload Relay Protectors, Start Relays, Start Capacitors, PTC Relays, Thermostats & Temperature Controls, and Compressor Start Kits for all major brands: Samsung, LG, Whirlpool, GE, Frigidaire, Kenmore, and more.

✓ Why Choose XPart Supply for Refrigerator Parts

  • 30+ Years Experience – We've been helping Canadians fix their appliances since the 1990s
  • Genuine OEM Parts – Factory-quality parts guaranteed to fit and perform
  • Expert Support – Our parts specialists can help you identify the right part for your model
  • Fast Canadian Shipping – Quick delivery across Canada from our warehouse
  • Hassle-Free Returns – If the part doesn't fit, we'll make it right

Need a replacement instead of a repair?

Sometimes the repair cost isn't worth it. XPart Supply carries Certified Pre-Owned washers, dryers, and major appliances that have been inspected, repaired, cleaned, and tested — available for local pickup or in-town delivery in Kitchener, Waterloo, Cambridge, Guelph, Brantford, and Hamilton.

View Certified Pre-Owned Appliances

✓ Frequently Asked Questions

Q: How do I know if my compressor relay is bad?
A: Common signs include clicking sounds from the compressor area but no cooling, or the compressor not starting at all. Shake the relay – if it rattles, the internal contacts are broken.

Q: How much does it cost to fix a compressor that won't start?
A: Parts typically cost between $15-$80. Overload relays run $15-$30, start relays $20-$40, and capacitors $25-$60. If you hire a technician, expect to pay $150-$300 total including labor.

Q: Is it worth fixing a refrigerator with a bad compressor?
A: If only the relay or overload is bad, it's definitely worth fixing. However, if the compressor itself is failed, consider the refrigerator's age. For fridges 10+ years old, replacement is usually more cost-effective.

✓ Get Your Refrigerator Compressor Running Again Today

Don't let a compressor that won't start ruin your food. Browse our selection of overload relays, start relays, capacitors, and refrigerator repair parts, or contact our expert team for personalized assistance.

Need help identifying the right part? Call our parts specialists toll-free or use our model number lookup tool to find exact-fit parts for your refrigerator.

XPart Supply Ltd. – Your trusted source for appliance parts in Canada since 1990.