Carrier Brand 35+5 uF MFD 370/440 VAC Dual Run Round Capacitor - Fits AC Unit Fan Motor, Heat Pump - Replaces 97F9834 - 2 Pack
Two 35+5 MFD 370/440 VAC dual run round capacitors for AC unit fan motors.
BlueStars 35+5 uF 370/440 VAC round dual run capacitor with technical specification infographic.
35+5 MFD 370/440 VAC dual run capacitor showing dimensions of 3.87 inches height and 2.12 inches diameter.
Infographic showing AC unit symptoms like hard starting and noise to indicate need for a dual run capacitor replacement.
Single 35+5 MFD 370/440 VAC dual run round capacitor with product specifications and safety instructions.
35+5 uF 370/440 VAC dual run round capacitor with terminal close-up and product specifications label.
Woman relaxing under a functioning air conditioner with BlueStars DIY repair promotional text overlay.
Two 35+5 MFD 370/440 VAC dual run round capacitors for AC unit fan motors.
BlueStars 35+5 uF 370/440 VAC round dual run capacitor with technical specification infographic.
35+5 MFD 370/440 VAC dual run capacitor showing dimensions of 3.87 inches height and 2.12 inches diameter.
Infographic showing AC unit symptoms like hard starting and noise to indicate need for a dual run capacitor replacement.
Single 35+5 MFD 370/440 VAC dual run round capacitor with product specifications and safety instructions.
35+5 uF 370/440 VAC dual run round capacitor with terminal close-up and product specifications label.
Woman relaxing under a functioning air conditioner with BlueStars DIY repair promotional text overlay.
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35+5 uF MFD 370/440 VAC Dual Run Round Capacitor - Fits AC Unit Fan Motor, Heat Pump - Replaces 97F9834 - 2 Pack

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35+5 MFD uF 370 VAC or 440 Volt Dual Run Round Capacitor

Key Features

  • Capacitance: 35/5 Microfarad (MFD)
  • Tolerance: ±5%
  • Voltage Rating: 370V or 440V AC (dual rated)
  • Frequency: 50/60 Hz
  • Shape: Round
  • Case Material: Aluminum
  • Terminals: 1/4 inch male quick-connect (3 terminals: C, HERM, F)
  • Operating Temperature: -40°C to +70°C (-40°F to +158°F)
  • Dimensions: 2 in. diameter x 4.75 in. height

Replaces / Cross-Reference Part Numbers

  • Replaces any round dual run capacitor with matching 35/5 MFD and 370V or 440V specifications.
  • Direct replacement for capacitors labeled 35+5 MFD, 35/5 µF, or similar variations.
  • Always verify capacitance (MFD), voltage (V), and physical dimensions before ordering.

Compatibility & Fitment

  • Used in air conditioning units, heat pumps, condenser fan motors, and compressors.
  • Combines two capacitors into one unit to power a compressor motor (HERM) and a fan motor (F).
  • Compatible with units from various manufacturers that require a capacitor with matching specifications.

When to Replace

  • Compressor or fan motor hums but does not start.
  • AC unit runs intermittently or fails to start.
  • Air conditioner blows warm air.
  • Visible signs of failure on the existing capacitor, such as a bulging or swollen top, leaking oil, or heavy corrosion.

Installation Tips

  • WARNING: Disconnect all electrical power to the HVAC unit before beginning installation.
  • Capacitors store an electrical charge. Safely discharge the old capacitor by shorting the terminals with an insulated screwdriver.
  • Note or photograph the wire placement on the C (Common), HERM (Hermetic/Compressor), and F (Fan) terminals before disconnecting.
  • Connect the wires to the corresponding terminals on the new capacitor.
  • Secure the new capacitor using the existing mounting strap or bracket.
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  • Step 1

    Step 1

    Turn off the power and locate the capacitor
  • Step 2

    Step 2

    Discharge any stored electricity by shorting the terminals
  • Step 3

    Step 3

    Take a photo or note how the wires connect. Disconnect wires & install the new capacitor.
  • Step 4

    Step 4

    Reassemble and test

FAQ

This dual run capacitor is designed for HVAC systems, specifically air conditioning units and heat pumps. It is engineered to provide the necessary electrical charge to start and run both the compressor and the fan motor simultaneously.
This unit is a direct replacement for OEM part number 97F9834 and is also compatible with Z97F9834.
Common signs of a failing capacitor include the AC unit failing to start, a humming sound coming from the compressor or fan motor without the unit engaging, or the fan motor struggling to reach full speed. If the top of the capacitor appears domed or swollen, it has failed and requires immediate replacement.
Yes. A capacitor rated for 440 VAC is fully compatible with systems originally using 370 VAC. The higher voltage rating indicates that the capacitor is built to withstand higher electrical stress, which often results in a longer service life.
Replacing a capacitor is a straightforward task that typically takes 15 to 30 minutes. You will need a screwdriver to access the electrical panel and a pair of insulated needle-nose pliers to disconnect the terminals. Always ensure the power to the HVAC unit is completely shut off at the breaker before attempting any work.
Yes. Capacitors store a significant electrical charge even after the power is turned off. Before touching the terminals, you must discharge the capacitor by using an insulated-handle screwdriver to bridge the terminals. Always verify the power is disconnected at the main disconnect box or circuit breaker before beginning.