Lennox Brand 35+5 uF MFD 370/440 VAC Dual Run Round Air Conditioner Capacitor - Fits AC Unit Fan Motor Start, Heat Pump
35+5 uF 440VAC round dual run capacitor for air conditioner and heat pump motor start.
BlueStars 35+5 uF 370/440 VAC round dual run air conditioner capacitor with technical specifications infographic.
35+5 MFD 370/440 VAC dual run capacitor showing 3.87 inch height and 2.12 inch diameter dimensions.
Air conditioner unit showing symptoms that require a 35+5 uF dual run capacitor replacement.
35+5 uF 440 VAC dual run round air conditioner capacitor with technical specifications label and installation note.
Infographic showing 35+5 uF dual run round air conditioner capacitor with close-up of terminal connectors.
Woman relaxing on a sofa under an air conditioner with BlueStars Economical DIY Repair text overlay.
35+5 uF 440VAC round dual run capacitor for air conditioner and heat pump motor start.
BlueStars 35+5 uF 370/440 VAC round dual run air conditioner capacitor with technical specifications infographic.
35+5 MFD 370/440 VAC dual run capacitor showing 3.87 inch height and 2.12 inch diameter dimensions.
Air conditioner unit showing symptoms that require a 35+5 uF dual run capacitor replacement.
35+5 uF 440 VAC dual run round air conditioner capacitor with technical specifications label and installation note.
Infographic showing 35+5 uF dual run round air conditioner capacitor with close-up of terminal connectors.
Woman relaxing on a sofa under an air conditioner with BlueStars Economical DIY Repair text overlay.
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35+5 uF MFD 370/440 VAC Dual Run Round Air Conditioner Capacitor - Fits AC Unit Fan Motor Start, Heat Pump

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97F9834 / Z97F9834 35+5 MFD uF 370/440 VAC Dual Run Round Capacitor

Key Features

  • Capacitance Rating: 35 + 5 Microfarad (MFD/uF)
  • Voltage Rating: 370 / 440 Volts AC (VAC)
  • Capacitance Tolerance: +/- 5%
  • Terminal Type: 3-Terminal (HERM, FAN, C)
  • Shape: Round
  • Construction: High-grade metallized polypropylene film
  • Operating Temperature Range: -40°C to +70°C
  • Safety Standard: UL Listed
  • Dimensions: 2 inch diameter x 4.75 inch height

Replaces / Cross-Reference Part Numbers

  • 97F9834
  • Z97F9834
  • C3355R
  • CBB65
  • CBB65-R

Compatibility & Fitment

  • Designed for HVAC systems, AC units, heat pumps, and furnaces.
  • Functions as a direct replacement for any dual run capacitor with matching 35/5 MFD and 370V or 440V specifications.
  • Provides power to the compressor motor (35 MFD) and the fan motor (5 MFD) in a single unit.
  • Compatible with units from brands such as GE, Genteq, Capcom, and others requiring equivalent specifications.

When to Replace

  • Compressor or fan motor fails to start or hums loudly.
  • Fan blades turn slowly or require a manual push to start.
  • AC unit is not cooling effectively.
  • Visible signs of damage on the old capacitor, such as swelling, bulging, or fluid leakage.

Installation Tips

  • Disconnect all electrical power to the HVAC unit before beginning work.
  • Safely discharge the existing capacitor by shorting the terminals with an insulated tool.
  • Verify the wiring connections (C, HERM, FAN) before removing the old capacitor.
  • Ensure the new capacitor's MFD rating (35/5) matches the original. The voltage rating can be equal to or higher than the original (e.g., a 440V capacitor can replace a 370V capacitor), but not lower.
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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 unit is a direct replacement for GE and Genteq part numbers 97F9834 and Z97F9834. It is also compatible with capacitors labeled with the specification 35+5 MFD at 370 or 440 VAC.
If your air conditioner or heat pump is struggling to start, making a humming noise without the fan spinning, or if the unit is blowing warm air while the compressor fails to engage, the capacitor is likely the culprit. A visual inspection may also reveal a bulging top or signs of leaking oil, which are clear indicators that the component needs to be replaced.
The installation is generally straightforward and can be completed in about 15 to 30 minutes. You will primarily need a screwdriver to access the electrical panel and a pair of insulated needle-nose pliers to transfer the wire connectors. Always ensure the power to the HVAC unit is completely shut off at the breaker before beginning.
Capacitors are heat-sensitive components. Over time, the internal dielectric material degrades due to the high operating temperatures inside the electrical cabinet and the constant electrical stress of starting the compressor and fan motor. Exposure to extreme weather conditions and age are the most common factors leading to eventual failure.
Yes, you can safely use a 440 VAC capacitor in place of a 370 VAC unit. The voltage rating on a capacitor represents the maximum voltage it can handle; therefore, a higher voltage rating is perfectly acceptable and often provides a longer service life, provided the MFD (microfarad) rating matches your equipment requirements.
Before installing the new capacitor, inspect the wire terminals for any signs of corrosion or melting. If the connectors are loose, crimp them slightly with pliers to ensure a tight, secure fit on the new terminals. A loose connection can cause arcing and lead to premature failure of the new part.