Trane CPT2329 Capacitor

The Trane CPT2329 Capacitor is a high-duty, cylinder-style motor start capacitor engineered to provide the high-torque boost required for heavy-duty HVAC compressors. Rated at 229 MFD and 330V, this round capacitor is a direct OEM replacement for the obsolete CPT0429 and CPT02329 models. Unlike standard run capacitors, this start-assist component is specifically designed to stay in the circuit for a fraction of a second, delivering the necessary phase shift to overcome high head pressures in Trane and American Standard systems, particularly those utilizing non-bleed TXVs or operating in low-ambient conditions. Its robust construction handles the intense inrush current typical of industrial HVAC start capacitors, ensuring the compressor reaches synchronous speed quickly to prevent winding overheat. This part is essential for maintaining the mechanical integrity of the motor in single-phase cooling and heat pump applications.

• Direct OEM Compatibility: Serves as the primary Trane CPT2329 replacement for legacy CPT0429 part numbers, ensuring fitment in original mounting brackets.
• Engineered for High Torque: The 229 +/- 5MFD rating provides consistent starting torque to help compressors clear mechanical resistance during rapid cycling.
• High Dielectric Strength: Rated for 330V, offering a reliable safety margin against voltage spikes during the starting phase.
• Quick-Connect Terminals: Features standard spade terminals for fast integration with existing potential relays and wiring harnesses.

Can I use the CPT2329 to replace an older CPT0429 model?
Yes, the Trane CPT2329 is the official direct replacement for the CPT0429 and and meets or exceeds all original 330V capacitor specifications for capacitance and voltage tolerance.

What are the signs that this start capacitor has failed?
Common indicators include the compressor "short-cycling," a distinct humming sound without the motor turning over, or visible expansion/leaking of the capacitor casing. Use a multimeter with an MFD setting to verify if the capacitance has dropped below 229 MFD +/- 5%.

Does this capacitor require a blow-off resistor?
While many HVAC motor capacitors in this range include a factory-installed resistor to bleed off stored charge for safety and potential relay protection, always verify the specific wiring requirements of your unit's schematic.

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.