Air Conditioner Capacitor

The Torque Capacitor Air Conditioner Capacitor is designed to support high performance, reliable operation of AC compressor and fan motors. It provides the critical electrical boost for startup and ensures stable, efficient running of the motor throughout the cooling cycle. Built for durability under thermal, electrical, and environmental stress, it’s ideal for residential and commercial air conditioning units.

Key Functions & How It Works

• Start Boost:
  When the AC turns on, the motor (especially the compressor) faces significant inertia. The start capacitor gives a powerful burst of electrical energy, creating a phase shift that lets the auxiliary (start) winding deliver extra torque to get the motor turning. Without it, the motor may struggle to start or fail to start under load. ac-installation-repair.com+2aichiplink.com+2

• Continuous Support (Run Capacitor Role):
  Once the motor reaches near-operating speed, the run capacitor (or the continuous duty capacitor) keeps supplying current in a shifted phase to maintain motor rotation smoothly. This helps reduce power fluctuations, improve efficiency, reduce noise and vibration, and protect the motor from overheating. it.kscapacitor.com+2Eyman Plumbing Heating & Air+2

• Dual or Single-Capacitor Systems:
  Some AC units use separate start and run capacitors; others use a dual capacitor that handles both the fan and compressor functions (or both start & run phases) in one unit. Proper switching (relay, potential relay, etc.) disconnects the start portion once the motor is up to speed. ac-installation-repair.com+1

Benefits of Torque Capacitor Air Conditioner Capacitor

• Enhanced startup performance — motors start reliably even under load or high ambient temperature.

• Energy efficiency — reduced current draw, smoother motor operation, improved power factor.

• Quieter operation — less humming, reduced mechanical stress during startup.

• Longer motor life — by reducing thermal and electrical stress caused by inefficient startup and unstable running.

• Reliability and safety — durable materials, proper ratings prevent failure, overheating, or system damage.

Signs of Failure & Maintenance

• Motors humming but not starting.

• AC starting slowly or with difficulty.

• Fan or compressor starting, stopping, or making noise.

• Reduced cooling efficiency or warm discharge.

• Increasing energy bills.

Regular checks (capacitance measurement, visual inspection for swelling, leakage, bulging, burnt terminals) help catch failures early. Replace capacitors with identical ratings for capacitance and equal or higher voltage.