ND55C99-21A08 - CPU Cooling Fan for Spectre x360 14-EF 14T-EF

The ND55C99-21A08 is a direct-replacement CPU-side cooling fan for compatible Spectre x360 13.5-inch 2-in-1 14-EF and 14T-EF systems. This side-specific centrifugal blower uses a 4-wire, 4-pin connection and is rated at DC 5V 0.50A.

Technical Specifications

• Part Number: ND55C99-21A08
• Component Type: Internal CPU cooling fan
• Fan Position: CPU side
• Fan Design: Side-specific centrifugal blower
• Input Voltage: DC 5V
• Rated Current: 0.50A
• Connector: 4-wire, 4-pin internal connector
• Platform: Spectre x360 14-EF / 14T-EF
• Platform Codename: Dashiell
• Regulatory Chassis: TPN-C155
• Package Contents: One CPU-side cooling fan

Interchangeable / Replacement Part Numbers

ND55C99-21A08

⭐ Related Parts and Cross-Sell - Sold Separately

➕ N12234-001 - Dual CPU GPU Cooling Fan Kit for Spectre x360 14-EF 14T-EF
➕ G751 - High Performance Thermal Grease for CPU and GPU Applications

✅ Confirmed Compatibility

Compatibility depends on the exact fan revision originally installed. The system must use ND55C99-21A08 with a DC 5V 0.50A rating and matching 4-pin connector.

✔️ Spectre x360 14-EF0000 / 14-EF0xxx Series
✔️ Spectre x360 14-EF1000 / 14-EF1xxx Series using the exact 5V fan revision
✔️ Spectre x360 14-EF2000 / 14-EF2xxx Series using the exact 5V fan revision
✔️ Spectre x360 14T-EF Series configurations using the exact 5V fan revision
✔️ Regulatory Chassis: TPN-C155 configurations equipped with ND55C99-21A08
✔️ 14-EF0000 Models: 14-EF0002TU, 14-EF0003TU, 14-EF0008CA, 14-EF0013DX, 14-EF0016TU, 14-EF0018CA, 14-EF0018TU, 14-EF0032TU, 14-EF0037TU, 14-EF0044TU, 14-EF0045TU, 14-EF0046TU, 14-EF0053TU, 14-EF0057TU, 14-EF0061TU, 14-EF0067TU, 14-EF0070TU, 14-EF0071TU, 14-EF0747NR, 14-EF0797NR
✔️ 14-EF1000 Models: 14-EF1047NR
✔️ 14-EF2000 Models: 14-EF2013DX, 14-EF2022TU, 14-EF2024TU, 14-EF2046TU, 14-EF2047NR, 14-EF2065TU, 14-EF2070TU, 14-EF2072TU, 14-EF2073TU, 14-EF2977ND

☑️ Key Features

☑️ Direct replacement for the CPU-side cooling fan
☑️ DC 5V 0.50A electrical rating
☑️ Four-wire, 4-pin internal connection
☑️ Side-specific housing and mounting configuration
☑️ Restores airflow through the CPU-side cooling system
☑️ Allows replacement of the CPU fan without purchasing the complete fan kit

⚙️ Fit Notes

• This listing includes one ND55C99-21A08 CPU-side fan only.
• The ND55C0A-21A09 companion fan has a mirrored housing and is not interchangeable with this fan.
• The companion fan, heat sink, heat pipes, mounting screws, protective tape and thermal compound are not included.
• Some 14-EF systems use different fan revisions, including 12V versions. Do not substitute a 12V fan for this 5V model.
• Compare the complete part number, voltage, housing shape, mounting tabs, connector keying, wire order and cable routing before ordering.
• Thermal compound is required only if the heat sink is loosened or removed during installation.
• Disconnect external power and the internal battery before servicing the cooling system.