SPP6 - Universal Supco Refrigerator Hard Start, Relay & Start Capacitor Combo

SKU : SPP6
$37.78
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SPP6 – Universal SUPCO Refrigerator Hard Start, Relay & Start Capacitor Combo

The SPP6 is a Universal SUPCO Hard Start Kit designed for refrigerators, freezers, and other single-phase compressor-based systems that struggle to start. This includes the SPP6 SUPCO hard start kit, a PTC (Positive Temperature Coefficient) relay + start capacitor combination engineered to deliver a strong starting boost to compressor motors under load.

Available through Appliance Kingdom with fast Canada-wide shipping, this part is widely used by appliance technicians and DIY repair customers to resolve compressor start-up failures in refrigeration systems.

Function & Importance in Refrigerators

The SPP6 hard start kit temporarily adds extra starting torque to the refrigerator compressor during startup. Once the compressor reaches operating speed, the internal PTC relay automatically removes the start capacitor from the circuit.

In a refrigerator system, this is critical because the compressor must overcome:

  • Internal refrigerant pressure

  • Cold-start resistance in the motor windings

  • Voltage fluctuations during startup

Without a proper hard start device, the compressor may fail to start or repeatedly “click” without running.

What Happens When This Part Fails or Is Needed

When a refrigerator compressor is weak or struggling, you may observe:

  • Compressor clicking but not starting

  • Repeated startup attempts with pauses

  • Refrigerator not cooling properly

  • Buzzing or humming from compressor area

  • Intermittent cooling performance

  • Overload relay tripping

The SPP6 is often used as a corrective assist when the compressor is still mechanically sound but needs extra starting torque.

Common Symptoms Indicating Replacement or Use

This hard start kit is commonly installed when:

  • Refrigerator compressor struggles to start

  • Unit only runs after multiple attempts

  • Startup is delayed or inconsistent

  • Voltage drop causes failed compressor start

  • Older compressor shows high starting load

If these symptoms are present, installing a hard start kit like SPP6 can often help restore normal startup performance.

Compatibility Guidance

  • Designed for refrigerators, freezers, and single-phase compressor systems

  • Works with PSC-type compressors commonly found in household refrigeration units

  • Suitable for systems experiencing hard-start or low-voltage conditions

Always verify your appliance model and compressor specifications before installation. If uncertain, consult a qualified technician to avoid improper application.

Key Features & Benefits

  • PTC solid-state relay + start capacitor combination

  • Provides high starting torque boost for compressors

  • Simple 2-wire installation across compressor terminals

  • Helps reduce compressor startup failures

  • Improves reliability in aging refrigeration systems

  • No moving parts for long service life

  • Designed for residential and light commercial refrigeration use

  • Trusted universal replacement solution for technicians

Installation Overview

Installation is generally straightforward but should be done with caution:

  • Disconnect power completely before servicing

  • Connect across Common and Herm (start) terminals

  • Mount securely in upright position inside compressor compartment

  • Ensure wiring is properly insulated

This is typically considered an easy-to-moderate installation, but refrigeration systems involve electrical risk. Professional installation is recommended if you are not experienced with compressor components.

Canada-Wide Availability & Supplier Trust

Appliance Kingdom supplies refrigeration and appliance repair components across Canada, supporting homeowners, landlords, and certified appliance technicians.

Customers benefit from:

  • Fast Canadian shipping

  • Reliable OEM and universal replacement parts

  • Technical support for part identification

  • Trusted sourcing for appliance repair components

Buyer Confidence & Support

  • Proven universal hard start solution for refrigerators

  • Helps restore compressor starting performance

  • Widely used by appliance repair professionals

  • Quality-tested SUPCO engineering

  • Support available for compatibility confirmation before purchase

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