Bambu Lab Hotend Heating Assembly — P2S

Bambu Lab Hotend Heating Assembly — P2S

On the P2S, the hotend and the thing that heats it are two separate parts. The hotend (with its nozzle) clips in and out for nozzle changes; the Hotend Heating Assembly is the module that stays bolted to the toolhead, clamps around the hotend, and does the actual work — it carries the heater and the thermistor that reports nozzle temperature back to the printer. Bambu Lab describes it simply: "an accessory installed on the toolhead, responsible for heating the printing materials to a molten state."

That split is useful when you're diagnosing a fault. If the nozzle refuses to heat, heats slowly, overshoots, or throws a temperature error no matter which hotend you fit, the problem is almost always here rather than in the hotend. This is the genuine Bambu Lab replacement (OEM part FAH049) — the same module your P2S shipped with, so there's no guesswork about fit, connector pinout or temperature calibration.

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Key features

Genuine Bambu Lab FAH049 Rated to 350 °C Heater + thermistor in one module Quick-release hotend clamp 3 mounting screws included P2S only

• Full 350 °C capability. The P2S hotend system is rated to 350 °C, so a healthy heating assembly is what lets you run the high-temperature engineering filaments the printer supports — not just PLA and PETG.
• Designed around the clamp. Bambu Lab's H2/P2S-generation design deliberately separates the thermal and electronic components from the hotend itself. The assembly uses a clamping mechanism, so hotends come out quickly for maintenance and the wiring stays put.
• A real repair, not a bodge. Heaters and thermistors are consumable — they fail from thermal cycling, from a nozzle clog that cooks the block, or from a cable that's been snagged. Swapping the module restores the printer to factory condition rather than patching around it.
• Straightforward to fit. Bambu Lab's own P2S guide walks through it: unload filament, let the hotend cool to 50 °C or below, power the printer off at the wall, then use an H1.5 Allen key. The three mounting screws you need are in the box.

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Who it's for

• P2S owners troubleshooting heat faults — nozzle not reaching temperature, slow heat-up, temperature-abnormality errors, or thermistor/heater error codes that follow the toolhead rather than the hotend.
• Print farms and small businesses keeping a spare on the shelf so a dead heater costs an hour, not a week.
• Schools and makerspaces where a shared P2S takes a knock and the toolhead wiring needs restoring to OEM spec.
• Anyone who has had a serious clog that left filament baked into the heating base.

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What's in the box

• 1 × Hotend Heating Assembly (P2S, FAH049) — heater and thermistor pre-assembled
• 3 × M2.5×5 mounting screws

Please note what is not included: the hotend and nozzle are a separate Bambu Lab part (the hotend clips into this assembly), and so is the hotend cooling fan — Bambu Lab's maintenance guide covers both jobs on one page, which is a common source of confusion. The H1.5 Allen key is also not supplied; the one from your P2S accessory kit is the right size.

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Specifications

OEM part number	FAH049
Compatibility	Bambu Lab P2S (P2 Series) only
Max printing temperature	350 °C
Function	Heats the hotend to melt filament; reports nozzle temperature via integrated thermistor
Mounting	Clamping mechanism around the quick-swap hotend; screwed to the toolhead
Material	Metal
Colour	Grey
Included contents	Hotend Heating Assembly × 1, M2.5×5 screw × 3
Tool required	H1.5 Allen key (not included)
Package size	60 × 60 × 30 mm
Gross weight	24.6 g
Heater wattage / thermistor type	not published by Bambu Lab

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Fitting it safely

1. Unload the filament and let the hotend cool to 50 °C or lower.
2. Power the printer off and disconnect it from the wall before touching any toolhead wiring — this is the step Bambu Lab calls out first, and it matters: live electronics and hand tools don't mix.
3. Release the hotend from the clamp, then use the H1.5 Allen key to remove the old assembly and fit the new one with the supplied M2.5×5 screws.
4. Reconnect, power up, and run a heat-up check before your first real print.

Bambu Lab's step-by-step guide with photos lives on the official wiki under P2S → Maintenance → Replace Hotend Heating Assembly and Cooling Fan. If you're not confident with toolhead wiring, it's a sensible job to hand to someone who is.