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Refrigerator or freezer compressor hums and clicks but fails to run — the failed start relay or weak start capacitor prevents the motor from reaching operating speed.
Unit runs warm because the compressor cannot complete a full start cycle; replacing all three electrical start components restores normal cooling.
A repetitive clicking sound every 2–5 minutes indicates the compressor overload is tripping on each failed start attempt — a classic sign of a faulty relay or capacitor.
Compressor struggles or fails to start during high-demand periods or when supplied voltage is slightly low; the URCO410 provides a boost to overcome low-voltage start problems.
The integrated overload protector prevents the start winding from remaining energized too long, eliminating the risk of winding burnout in older or weakened compressors.
💡 Pro Tip: Is Your Compressor Failing to Start?
Your part is likely the culprit if you notice any of the following:
⚠️ Refrigerator or freezer not cooling — compressor hums briefly then shuts off
⚠️ Clicking sound every 2–5 minutes as the compressor attempts and fails to start
⚠️ Compressor runs on low-voltage days (summer heat, extension cords) but fails on normal days
⚠️ Original start relay rattles when shaken — internal component is broken
🔍 Quick Test: Remove the original start relay from the compressor terminals and shake it near your ear. If you hear rattling, the relay is defective and the URCO410 kit is your direct replacement. Always confirm your system uses a run capacitor before ordering — for older systems WITHOUT a run capacitor, use the RCO410 instead.
📦 What's in the Box
✅ 1× URCO410 3-in-1 Hard Start Kit (Solid-State Relay + Start Capacitor + Overload, Pre-Wired, 115V / 243–292 MFD)
✅ 2× Female Quick-Connect Terminals
✅ 2× Wire Connectors (Wire Nuts)
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Disclaimer: Compatibility information, part numbers, and model fitment data on this page are sourced from manufacturer databases and third-party references. While we strive for accuracy, please verify your appliance model number before ordering. Heima is not responsible for errors or omissions in compatibility listings.
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