Bambu Lab Hotend Cooling Fan for P2S

The Bambu Lab Hotend Cooling Fan for P2S is an original replacement cooling assembly designed specifically for the Bambu Lab P2S toolhead.

Its primary function is to cool the upper section of the hotend, helping prevent filament from softening before it reaches the intended melt zone. Maintaining this temperature separation is essential for reliable extrusion and helps reduce heat creep, filament blockages, and hotend clogs during printing.

The FAF021 assembly includes both the cooling fan and dedicated fan duct, allowing airflow to be directed correctly around the hotend cooling area.

Key Features

• Original Bambu Lab hotend cooling fan

• Part number FAF021

• Designed specifically for Bambu Lab P2S

• Includes dedicated hotend fan duct

• Helps prevent premature filament softening

• Reduces the risk of heat-creep-related blockages

• Closed-loop fan control on the P2S

• Includes the required BT2×5 mounting screws

Dedicated Hotend Cooling

During printing, the nozzle operates at high temperature while the upper section of the hotend must remain much cooler.

The FAF021 fan directs airflow through the included fan duct and across the hotend cooling area, helping remove unwanted heat before it travels upward into the filament path.

This allows filament to remain solid until it reaches the intended melting zone.

Helps Prevent Heat Creep

If the hotend heatsink is not cooled correctly, heat can travel upward and soften filament prematurely.

This condition can contribute to:

• Hotend clogs

• Filament jams

• Under-extrusion

• Extruder clicking

• Increased feeding resistance

• Failed filament loading

• Inconsistent extrusion

• Interrupted print jobs

A properly functioning hotend cooling fan helps maintain the thermal separation required for stable filament feeding.

Closed-Loop Fan Control

The Bambu Lab P2S uses closed-loop control for its hotend cooling fan.

This allows the printer to monitor fan operation rather than simply supplying fixed power without feedback.

Closed-loop monitoring helps the printer detect abnormal fan operation and maintain more consistent cooling performance during printing.

Integrated Fan Duct

The P2S version includes a dedicated hotend fan duct.

The duct channels airflow from the fan toward the required cooling area, improving the effectiveness of the fan while keeping the airflow focused around the hotend heatsink.

When replacing the fan, the correct duct should also be installed in the intended orientation.

Designed Specifically for P2S

The FAF021 assembly is designed for the Bambu Lab P2S toolhead.

Its:

• Mounting points

• Fan duct

• Electrical connector

• Cable arrangement

• Physical dimensions

are designed around the P2S toolhead structure.

Fans from other Bambu Lab printer families should not be assumed to be interchangeable.

Useful Replacement Part

Replacement may be appropriate if the original cooling fan develops symptoms such as:

• Fan not spinning

• Abnormal fan speed warning

• Intermittent fan operation

• Grinding or rattling noise

• Reduced airflow

• Damaged fan blades

• Damaged cable or connector

• Repeated heat-creep-related clogging

Replacing the failed component with the correct FAF021 assembly helps restore the intended cooling performance of the P2S toolhead.

Important for Enclosed Printing

The P2S uses an enclosed printing chamber, making reliable hotend cooling particularly important during extended prints and when printing at elevated temperatures.

The hotend cooling fan helps keep the cold side of the hotend within its intended operating range even while the nozzle and surrounding chamber remain warm.

Technical Specifications

Applications

• P2S hotend cooling

• Toolhead maintenance

• Replacement of failed cooling fan

• Repair of noisy fan

• Heat-creep troubleshooting

• Hotend maintenance

• Preventive spare-part replacement

• Print farm maintenance

• Workshop and service use

Compatibility

Compatible with:

• Bambu Lab P2S

• Bambu Lab P2 Series toolhead configuration

This is the dedicated P2S version and should not be assumed compatible with A1, A2L, H2 Series, X Series, or older P1 Series cooling fan assemblies.

Package Includes

• 1 × Bambu Lab Hotend Cooling Fan

• 1 × Hotend Fan Duct

• 3 × BT2×5 Screws

Installation Note

Switch off the printer and disconnect it from power before replacing the hotend cooling fan.

During installation:

• Remove the toolhead covers as required

• Disconnect the original fan connector carefully

• Avoid pulling directly on the wires

• Install the replacement fan and duct in the correct orientation

• Secure the assembly with the supplied BT2×5 screws

• Route the cable correctly

• Ensure the fan blades rotate freely

• Confirm normal fan operation after reassembly

Troubleshooting Note

A failed hotend cooling fan can cause feeding and clogging problems, but similar symptoms may also result from:

• Partially blocked nozzle

• Damaged hotend

• Incorrect filament temperature

• Wet or contaminated filament

• Extruder problems

• Toolhead board faults

• Loose or damaged connectors

Proper diagnosis should be carried out before replacing parts.

Usage Note

This product includes the P2S hotend cooling fan, hotend fan duct, and mounting screws only. The hotend, heater assembly, extruder, toolhead board, part cooling fan, and other toolhead components are not included unless separately specified.