Carrier KSAHS1501AAA Hard Start Kit

The Carrier KSAHS1501AAA Hard Start Kit is a field-installed OEM compressor start assist designed to provide the necessary starting torque for single-phase reciprocating and scroll compressors. This start capacitor and relay kit is specifically engineered for Carrier, Bryant, and Payne residential air conditioning and heat pump systems that encounter high-pressure differentials during the start cycle. By utilizing a high-quality 88-108 MFD start capacitor rated at 330V and a dedicated potential relay, this kit significantly reduces the duration of locked rotor amperage (LRA) draw, protecting internal windings from excessive heat and mechanical stress.

For technicians servicing high-efficiency HVAC systems, the KSAHS1501AAA is the correct factory-authorized replacement for legacy part numbers such as KAAHS0101AAA and 313965-751. This kit ensures rapid compressor startup in demanding environments, such as long line set applications or systems equipped with non-bleed thermostatic expansion valves (TXV). The packaged 1PKSAHS1501AAA includes the capacitor, relay, mounting strap, and a complete wiring harness to maintain UL and AHRI performance ratings of the parent equipment.

• Optimized Starting Torque: Provides the requisite boost to overcome high head pressures, ensuring a reliable start every time.
• Extended Component Life: Minimizes the time the compressor spends in the start winding phase, reducing wear on the compressor motor.
• OEM Compatibility: Precision-matched for Carrier heat pumps and AC units, maintaining system efficiency and electrical integrity better than universal alternatives.
• Reduced Voltage Drop: Stabilizes current draw during ignition, preventing light flickering and nuisance tripping in residential circuits.
• Durable Construction: Built with heavy-duty electrical components designed for the high-cycle demands of modern cooling systems.

While hard start kits serve a general purpose, the KSAHS1501AAA is a Carrier Genuine OEM part. For optimal HVAC system performance and to ensure the compressor operates within factory specifications, it is recommended specifically for Carrier, Bryant, and Payne models listed in the technical service literature.

If you observe a compressor struggling to turn over, hear a distinct "humming" on startup, or find the system is tripping the outdoor breaker during the hit, a start capacitor and relay kit is often the professional solution to resolve hard starting issues caused by pressure imbalances.

The KSAHS1501AAA is versatile and approved for use with both reciprocating and scroll-type compressors, particularly those using R-410A refrigerant where higher starting pressures are common.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.