5Aplusreprap Ender 3 Hotend Upgrade Review
If you’ve ever swapped a stock Ender 3 hotend for a budget upgrade only to fight with loose thermistors and inconsistent extrusion, you know the pain of a part that looks right but doesn’t perform. The 5Aplusreprap Ender 3 Hotend Upgrade: M3 Stud Thermistor for Ender-3 V2/Pro and similar Creality machines promises to solve that exact headache with a pre-assembled design that should be drop-in easy.
Our editorial team dug into verified buyer reports, manufacturer specs, and real-world print logs to see if this $16 hotend kit actually delivers on its claims. Short answer: for most users, it’s a solid upgrade that fixes the stock hotend’s weak points, but it’s not a silver bullet for every printer. Here’s the full breakdown.
What it is
A hotend is the business end of an FDM 3D printer; it melts filament and lays it down layer by layer. The 5Aplusreprap kit is a complete replacement for the stock hotend found on Creality Ender 3, Ender 3 Pro, Ender 3 V2, Ender 5, and CR-10 printers. It comes pre-assembled with a 24V 40W heater cartridge, a 100k NTC thermistor held in by an M3 stud, a brass 0.4mm nozzle, and a PTFE-lined heat break.
The big selling point over the stock part is the thermistor mounting: it uses a screw, not a fragile glass bead crammed into a hole. That small change fixes one of the most common failure points on Creality machines.
Setup & first impressions
Out of the box, the kit feels solid for the price. The aluminum heat sink is machined cleanly, and the brass nozzle is already seated. Verified buyer reports across hundreds of reviews note that the thermistor screws in easily and stays put.
No wire crimping or soldering required. The included PTFE tube is a standard 4mm OD, 2mm ID Capricorn-style tube, though it’s not branded.
Installation took about 20 minutes for our editorial team based on user guides. You remove the old hotend, thread the new heater cartridge wires into the terminal block, and secure the thermistor wire. The M3 stud aligns perfectly with the stock bracket.
One minor frustration: the heat sink fan duct doesn’t come with the kit, so you reuse your original. Several users mention the included nozzle is slightly shorter than stock, which can affect the gap between the heat break and the heat sink. That’s easy to adjust with a quick turn of the grub screw.
Key specifications
| Voltage | 24V DC |
| Heater power | 40W |
| Thermistor type | 100k NTC with M3 stud mount |
| Nozzle diameter | 0.4 mm brass |
| Heat break material | PTFE-lined (not all-metal) |
| Compatible printers | Ender 3 / Pro / V2, Ender 5, CR-10 series |
| Included in box | Hotend assembly, heater cartridge, thermistor, nozzle, PTFE tube, screws |
Daily-use experience
Print quality and consistency
Once dialed in, the hotend delivers consistent extrusion. Verified user prints show clean layer lines on PLA and PETG at speeds up to 60 mm/s. The M3 thermistor mount keeps temperature readings stable within ±1°C during a 12-hour print, according to multiple user logs.
That’s a big step up from the stock unit where the glass bead thermistor can shift mid-print, causing a 5°C swing and eventually a thermal runaway error. The 40W heater is enough to reheat the block quickly after a retraction, but it’s not overpowered for small nozzles.
Ease of installation
You don’t need to solder or crimp. The heater cartridge wires have pre-tinned ends that fit directly into the screw terminals on the Creality V4.2.2 mainboard. The thermistor wires are bare ends, but you can tin them or use a ferrule.
The included screws and M3 stud align perfectly. One catch: the nozzle is a bit shorter than the stock Creality nozzle, so you may need to loosen the heat sink grub screw and push the heat break down a fraction. Several users report that skipping this step leads to filament oozing between the heat break and the heat sink.
A quick adjustment fixes it.
Reliability and heat management
The PTFE-lined heat break limits you to about 260°C max. Above that, the PTFE degrades and releases toxic fumes. So nylon and polycarbonate are out.
But for PLA, PETG, and TPU, it’s fine. The heat sink is large enough to keep the cold end below 50°C during a 10-hour print, as long as you have a working fan. The included thermal paste on the heat break threads helps with heat transfer.
One downside: after about 500 hours of printing, some users report that the PTFE tube inside the heat break starts to compress, causing a gap that leads to clogs. That’s a known limitation of PTFE-lined hotends, not unique to this kit.
Pros & Cons
✓ Pros
- M3 stud thermistor eliminates the stock glass bead’s loose-contact headaches — temperature stays stable print after print
- Pre-assembled out of the box, so you can swap in under 20 minutes with basic tools
- Compatible with four Creality printer families without any bracket or adapter changes
- Heats up from 25°C to 200°C in about 60 seconds, according to manufacturer specs and user timings
- Costs less than a single spool of filament — a budget-friendly fix for thermal runaway issues
✗ Cons
- PTFE-lined heat break limits max temperature to 260°C — no high-temp materials like polycarbonate
- Included nozzle is slightly shorter than stock, requiring a quick heat break adjustment during installation
- PTFE tube inside the heat break can degrade after hundreds of hours, potentially causing clogs
- No spare nozzle or extra thermistor included — you’ll need to buy replacements separately
Score breakdown
Who should buy it
Buy it if you…
You’re running a stock Ender 3 that’s given you thermal runaway errors or inconsistent extrusion. The M3 thermistor mount alone is worth the upgrade. It’s also a no-brainer if you’re on a tight budget and need a quick replacement for a failed hotend.
You don’t want to mess with crimping wires or sourcing individual parts. This kit is ready to go, and you’ll have it installed before a single print finishes.
Skip it if you…
You’re printing high-temperature materials like nylon, polycarbonate, or ASA. The PTFE-lined heat break can’t handle those. Also skip it if you want a full direct-drive or all-metal upgrade.
This kit keeps the same Bowden-style setup and the same 260°C ceiling. If you’re planning to upgrade your extruder to a direct-drive system, you’ll want a different hotend, like a V6 clone or a Micro Swiss all-metal.
Better alternatives
If you need an all-metal hotend, the Micro Swiss All-Metal Hotend Kit for Creality printers is a popular choice at about $40. It goes up to 300°C and won’t degrade. If you prefer sticking with a PTFE-lined solution but want a name-brand part, the Creality Official Stock Hotend Kit is around $15 and is a direct OEM replacement.
The 5Aplusreprap kit is cheaper than the Micro Swiss and easier to install than the official Creality part (which often requires assembling the thermistor yourself).
Frequently Asked Questions (FAQ)
Does it work with the Ender 3 V2 with the CR Touch probe?
Yes. The hotend’s physical dimensions are identical to the stock unit, so the CR Touch mount stays in place. You just need to adjust the Z-offset after installation because the new nozzle height might shift slightly.
Do I need to change firmware after installing this hotend?
No. The thermistor is the same 100k NTC type, and the heater is 24V 40W, same as the stock part. Your existing firmware will work without any changes.
Just run a PID autotune to get the most stable temperatures.
What temperature range can I safely use?
With the included PTFE-lined heat break, keep the block below 260°C. Above that, PTFE breaks down. If you want to print at 260°C, upgrade to a Capricorn PTFE tube or switch to an all-metal heat break.
How long does the heater cartridge last?
Users report 500-1000 hours of printing before the heater cartridge may need replacement. The included cartridge is a standard 6x20mm 24V 40W unit, easily sourced on Amazon for a few dollars.
Is the included PTFE tube good enough?
It’s a generic PTFE tube, not a premium Capricorn, but it works fine for PLA and PETG at speeds under 80 mm/s. If you start printing with flexible filaments or need tighter tolerances, swap it for a Capricorn tube.
Will it fit a CR-10 V3?
The CR-10 V3 uses a different hotend mounting pattern (a 3-hole bracket vs 2-hole). This kit is designed for the 2-hole mounting pattern found on the Ender 3 series. For the CR-10 V3, you’ll need an adapter or a different hotend.
Final verdict
The 5Aplusreprap Ender 3 Hotend Upgrade earns a solid 4.3 out of 5 stars. It’s the best sub-$20 hotend we’ve researched for fixing the stock Creality unit’s thermistor reliability and ease of installation. If you’re willing to stay within the 260°C limit and don’t mind the occasional PTFE tube replacement after hundreds of hours, this is a fantastic value that solves a common printer headache.
Affiliate disclosure: This post contains affiliate links. If you buy through one of these links, I may earn a small commission at no extra cost to you. It never changes my recommendation, I only suggest gear I’d actually buy myself.
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