Restore your NXA648GKA100 central air conditioner running efficiently with genuine OEM replacement parts from Repair Clinic. The NXA648GKA100 is a four-ton residential outdoor condensing unit using R-410A Puron refrigerant. ICP, Heil, Tempstar, Arcoaire, and WeatherKing are all International Comfort Products brand designations sharing the same platform engineering and fully interchangeable service components. The NXA648GKA100 is a four-ton configuration in the ICP NXA6 series, above the two-ton NXA624GKA100. The dual run capacitor, contactor, and outdoor fan motor account for the vast majority of service calls. Repair Clinic stocks genuine ICP OEM parts for the NXA648GKA100 including the ICP capacitor parts, ICP contactor parts, ICP fan motor parts, and ICP high-pressure switch parts. Browse the ICP central air conditioner parts catalog filtered by NXA648GKA100 for the complete parts inventory.
NXA648GKA100: Four-Ton Outdoor Condensing Unit Service
Annual capacitance testing of the dual run capacitor before the cooling season is the most cost-effective preventive maintenance step for the NXA648GKA100. Match all microfarad values from the installed capacitor label before ordering a replacement. The central air conditioner repair help section covers capacitor testing and contactor diagnosis for this platform.
Most Replaced Parts on the NXA648GKA100
Dual Run Capacitor for the NXA648GKA100
The dual run capacitor provides starting and running torque for both the compressor and outdoor fan motor. A reading more than 10% below the rated value causes the compressor to hard-start. Match all three microfarad values from the installed capacitor label before ordering.
NXA648GKA100 Contactor
The contactor closes the 240-volt compressor circuit at every cooling cycle start. Pitted or burned contacts generate heat that transfers to the compressor motor terminals. Replace a contactor with visibly eroded contacts before compressor winding damage occurs.
Outdoor Fan Motor for the NXA648GKA100
The outdoor fan motor pulls air through the condenser coil. Test the run capacitor before ordering a replacement motor, as a failed capacitor produces identical slow-start symptoms at a fraction of the motor replacement cost.
High-Pressure Switch for the NXA648GKA100
A high-pressure switch that trips repeatedly under normal ambient conditions points to a blocked condenser coil, failed fan motor, or refrigerant overcharge rather than a failed switch diaphragm.
Why Choose Repair Clinic for NXA648GKA100 Parts
- Genuine ICP NXA6 OEM Components: Four-ton dual run capacitors, contactors, and fan motors confirmed for the NXA648GKA100 with Heil, Tempstar, Arcoaire, and WeatherKing cross-reference ICP central air conditioner parts.
- R-410A Puron Platform: The NXA648GKA100 uses R-410A refrigerant. Refrigerant circuit service requires EPA 608 certified technicians.
- Annual Capacitor Testing Priority: Pre-season capacitance testing is the most cost-effective preventive maintenance step for the NXA648GKA100.
- 365-Day Returns: Return any uninstalled part within a full year of purchase with no restocking fees.
NXA648GKA100 Parts FAQ
What is the NXA648GKA100 and what ton size is it?
The NXA648GKA100 is a four-ton residential outdoor condensing unit using R-410A Puron refrigerant. ICP, Heil, Tempstar, Arcoaire, and WeatherKing are all International Comfort Products brand designations sharing the same platform engineering and fully interchangeable service components. The NXA648GKA100 is a four-ton configuration in the ICP NXA6 series, above the two-ton NXA624GKA100.
Why does my NXA648GKA100 hum but not start?
A unit that hums but does not start has most commonly failed at the dual run capacitor. Test the capacitor with a digital capacitance meter before testing any other component.
How does the ICP NXA648GKA100 differ from the NXA624GKA100?
The NXA648GKA100 is a four-ton unit while the NXA624GKA100 is a two-ton unit in the same ICP NXA6 series. The dual run capacitor carries different compressor-section microfarad ratings between the two tonnages.
How often should I test the capacitor on the NXA648GKA100?
Test the capacitor annually before the cooling season. A reading more than 10% below the rated microfarad value indicates a weakening capacitor that should be replaced before it fails under peak summer load.
