Is the Bambu Lab P2S Top Cover Riser a Must-Have Accessory? A Complete Breakdown

For Bambu Lab P2S 3D printer users, one of the most frequent questions about upgrades centers on the P2S Top Cover Riser—and whether this seemingly simple accessory is a worthwhile investment for their printing setup. After hands-on testing, temperature analysis, and real-world printing trials, we’re breaking down exactly how this riser solves the P2S’s core pain points, its key benefits, and when it’s an essential add-on (and when it’s optional) for your workflow.

The Bambu Lab P2S builds on the success of the P1S with impactful upgrades, including a tempered capacitive touchscreen and real-time internal temperature monitoring—yet it faces a persistent issue: significant internal heat buildup, even with all four side covers removed. Our hands-on tests confirmed the P2S’s internal ambient temperature hovers at a steady 46°C (114.8°F) during operation, a threshold that creates major problems for the most popular filament choice: PLA.
PLA is a low-temperature filament highly sensitive to heat exposure, and prolonged contact with 40°C (104°F)+ environments inside the printer chamber drastically raises the risk of filament jams and nozzle clogs. These issues don’t just ruin ongoing prints—over time, repeated clogs can cause permanent damage to the P2S’s nozzle, leading to costly replacements and downtime. For PLA users, this heat buildup isn’t just a nuisance; it’s a barrier to consistent, reliable printing.

The P2S Top Cover Riser—especially models integrated with rear cooling fans—is engineered to directly address the P2S’s heat buildup issue, and it does so far more effectively than makeshift cooling solutions. Here’s how it delivers results:

For users considering skipping the P2S Top Cover Riser, the only viable workarounds are keeping the printer’s main door open or retrofitting a generic exhaust fan kit. While these methods dissipate a small amount of heat, they are far less effective than the riser’s dedicated, chamber-matched cooling system. Worse, they compromise the P2S’s enclosure integrity—leaving the printer vulnerable to dust, debris, and ambient temperature fluctuations that can also disrupt print quality. The riser solves heat buildup without sacrificing the printer’s structural or environmental protection.

Beyond its core cooling function, the P2S Top Cover Riser delivers a practical mechanical benefit that saves users time and money on replacement parts: it elevates the printer’s top cover (and associated AMS components) to create a 2–3cm (0.79–1.18 inches) gap between the PTFE tube and the printer’s glass/metal top surface.
The PTFE tube is a critical, yet often overlooked, wear part that guides filament to the P2S’s nozzle. Without the riser, the tube rubs against the printer’s top cover during operation, causing friction, wear, and eventual cracking—requiring frequent replacements. The riser eliminates this contact entirely, drastically extending the PTFE tube’s lifespan and reducing the need for routine maintenance on this key component.

The value of the P2S Top Cover Riser hinges entirely on the filaments you use most often. Here’s a clear breakdown of when it’s a must-have, and when it’s not a priority:

If PLA is your go-to filament—whether for hobby projects, prototyping, or daily printing—the P2S Top Cover Riser is non-negotiable. It mitigates the P2S’s biggest flaw (heat-induced clogs), ensures consistent print quality, and protects your nozzle from avoidable damage. For anyone who prints with PLA regularly, it’s not an upgrade—it’s a necessity for reliable operation.

If your workflow centers on ABS, PETG, or other high-temperature filaments, the P2S Top Cover Riser offers minimal benefit. These materials require higher internal chamber temperatures to print successfully, so heat buildup is not a concern—instead, it’s a requirement. For high-temp filament users, the riser’s cooling features are unnecessary, and the PTFE tube wear reduction is a minor perk that doesn’t justify the investment.

The P2S Top Cover Riser is not a “luxury” accessory for Bambu Lab P2S owners—it’s a practical, problem-solving upgrade for the vast majority of users who rely on PLA. Its integrated cooling fans fix the P2S’s core heat buildup issue, eliminating nozzle clogs and print failures, while its mechanical design extends the lifespan of the PTFE tube and reduces routine maintenance.
For high-temperature filament users, it’s an optional add-on with little tangible value. But for anyone who prints with PLA regularly—hobbyists, makers, and small-scale prototypers alike—the P2S Top Cover Riser is an essential investment to keep your P2S running smoothly, avoid costly repairs, and ensure clog-free, consistent printing every time.