Supco Refrigerator Power Start Relay URSC10

The Supco URSC10 Power Start Relay is a universal capacitor start device designed to boost compressor starting torque in domestic and commercial refrigeration systems. It replaces failed or weak current-type start relays when fitment is confirmed by appliance model number.

Is This the Right Part?

Confirm the complete model number before ordering. Similar relays may differ in voltage rating, HP range, terminal type, or mounting configuration.

Common Symptoms

• Refrigerator or freezer compressor will not start
• Compressor hums briefly then shuts off (thermal overload trips)
• Unit runs constantly but does not cool properly
• Clicking sound from compressor area on start attempts

Check Before Replacing

• Verify the existing start relay rattles when shaken — a broken relay pellet is a common sign of failure
• Check the run capacitor for bulging or leakage if one is present
• Test the compressor windings for continuity (open winding = compressor failure, not relay)
• Inspect wiring terminals at the compressor for corrosion or loose connections

Part Details

Installation Notes

1. Disconnect power to the appliance before beginning any work.
2. Photograph existing wiring and terminal positions at the compressor.
3. Compare the URSC10 against the original relay before installation.
4. Inspect nearby wiring, terminals, and the overload protector for damage.
5. Restore power and verify the compressor starts and the unit cools correctly.

Use a qualified technician when diagnosis or installation is outside your experience.

Verified Compatible Models

Confirm your full model number (including suffixes and revision digits) before ordering. This relay is designed for domestic and commercial refrigerators and freezers using 115V compressors rated 1/20–1/2 HP.

Fitment reminder: Match the complete model number, including suffixes and revision digits, before ordering.