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Compressor hums, buzzes, or clicks but fails to fully start — common on aging or low-voltage systems.
Excessive inrush current during compressor startup repeatedly trips the breaker; SPP5 reduces startup amp draw.
Compressor takes unusually long to reach operating speed or stutters on startup, indicating insufficient starting torque.
Unit fails to start during peak demand or when supply voltage is marginally low; SPP5 compensates with extra torque boost.
Repeated hard-start stress degrades compressor windings over time; installing SPP5 prolongs compressor life by smoothing startup load.
💡 Pro Tip: Is Your AC Compressor Struggling to Start?
Your part is likely the culprit if you notice any of the following:
⚠️ AC unit trips the circuit breaker when trying to start
⚠️ Compressor hums or buzzes but fails to fully start up
⚠️ System performs poorly during peak summer heat or low-voltage events
⚠️ Compressor starts slowly or stutters before reaching full speed
To confirm: use a clamp meter on the compressor common wire during startup. If inrush amps are excessively high or the compressor stalls, installing the SPP5 hard start kit typically resolves the issue immediately. Always disconnect power before servicing.
📦 What's in the Box
✅ 1× SPP5 Hard Start Kit — PTC Relay + 43–53 MFD Start Capacitor (90–277 VAC, 1/2–10 HP)
✅ Pre-attached lead wires for direct connection
✅ Mounting loop included
✅ Installation instructions sheet
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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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