How to Run Antminer Without Fans and without fan spoofers using Vnish Firmware (for Immersion & Custom Cooling Mods)
- Harsh Gupta
- May 20
- 3 min read
Are you planning to run your Antminer without fans for immersion cooling or a custom third-party cooling setup? If you've tried before, you probably ran into the "fan error" that halts your miner.
With Vnish firmware, bypassing the fan requirement is easy and safe—allowing you to disable fan error checks and fully customize your Antminer for immersion setups, external radiators, or any other innovative cooling methods.
In this guide, we’ll show you how to disable fan errors on compatible Antminers using Vnish firmware, available from vnish.in/downloads.
🔧 Why Remove the Fans?
Many miners are now opting for:
🌊 Immersion cooling – Submerging the miner in dielectric fluid for silent, efficient cooling.
❄️ Custom external cooling – Using industrial-grade fans, radiators, or AC-cooled chambers.
🔇 Noise reduction – Replacing stock fans with quieter alternatives.
However, Antminers are designed to halt operations if a fan is missing or not spinning, to prevent overheating—unless you tell them not to.
✅ What You’ll Need
A compatible Antminer (S19 , S21 , L7 , L9 series and others supported by Vnish)
A microSD card or access to your miner's firmware upgrade interface
Access to Vnish Firmware, downloadable from:👉 https://vnish.in/downloads
Network access to your miner's dashboard
🛠️ Step-by-Step Guide
1. Install VNish Firmware
Download the appropriate firmware for your Antminer model.
Flash the firmware onto your miner using either:
Web interface (firmware upgrade tool on the miner dashboard)
MicroSD card method (detailed instructions provided on the download page)
Note: Make sure to use the firmware version designed specifically for your model.
2. Log Into Vnish Dashboard
Once installed, connect to your miner's IP address in your browser.Default login:
Username: root
Password: root (unless changed)
3. Disable Fan Check
Navigate to the "Advanced Settings" or "Expert Settings" tab.
Look for the "Fan Check" or "Ignore Fan Error" option.
Enable it or set to "Yes".
✅ This setting allows the miner to continue running even if no fans are detected or connected.
4. Power Down & Remove Fans
Safely shut down your Antminer.
Disconnect and remove the stock fans.
Proceed to:
Mount the miner into your immersion cooling tank, OR
Connect your custom cooling system.
⚠️ Caution: Always ensure alternative cooling is active and effective before running without fans to prevent hardware damage.
5. Power Up and Start Mining
Turn the miner back on.
The Vnish firmware will ignore the missing fans.
You’re now mining fan-free with your custom cooling setup!
🧠 Bonus: Monitor Temperature in Real Time
Vnish provides real-time temperature monitoring for each hashboard. Use this feature to keep an eye on thermal performance with your new cooling system.
⚙️ Compatible Antminers
Vnish firmware supports a wide range of models, including:
L7, L9
S19, S19 Pro, S19j, S19 XP , S19 Hydro
S21, T21, S21 Hydro
And others — check vnish.in/downloads for the full list.
🧪 Perfect for Immersion Cooling Projects
Whether you're building a DIY immersion cooling tank or scaling up a large operation, Vnish gives you the flexibility to break free from stock fan restrictions.
🚀 Download Vnish Firmware Today
🔚 Final Tips
Always keep an eye on chip temperature via Vnish.
Use thermal alarms or auto shutoff settings as extra safety measures.
Vnish also offers performance tuning, overclocking, and power limits for even better optimization.
Stay cool and mine smarter — with Vnish.
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