How to Bypass Temperature Sensor Issues in Antminer Using Vnish Firmware

Harsh Gupta
May 18
2 min read

Antminer temperature sensor error fix : fail to read pic temp / abnormal temperature

If you're running an Antminer and encountering issues with faulty or missing temperature sensors, you're not alone. These problems can cause your miner to stop hashing or display errors, making it difficult to maintain a stable operation. Fortunately, with Vnish custom firmware from vnish.in, there's a reliable way to bypass temperature sensor issues and get your device back to work.

In this guide, we’ll walk you through how to use Vnish firmware to bypass the temperature sensor check and stabilize your mining rig.

⚠️ Why Bypass the Temperature Sensor?

Antminers rely on temperature sensors on their hashboards to monitor heat and ensure safe operation. However, over time, these sensors may fail or become unreliable due to age, corrosion, or hardware defects. When this happens, the miner may refuse to boot or stop hashing.

Instead of replacing the entire hashboard, you can use Vnish firmware to override the sensor check—restoring operation even with faulty sensors.

✅ Prerequisites

Before you proceed, ensure you have the following:

An Antminer model supported by Vnish (e.g., S19, T21, S21, L7, L9 etc.)
Access to the miner’s web interface or SSH
Vnish custom firmware downloaded from https://vnish.in/downloads
Basic knowledge of flashing firmware

🔧 Step-by-Step Guide

Step 1: Flash Vnish Firmware

Visit https://vnish.in/downloads and download the correct Vnish firmware for your Antminer model.
Flash the firmware using the standard SD card method or through the web interface if your miner is operational.
After flashing, access the miner's web GUI via its IP address.

⚠️ Make sure to back up your settings and be aware that flashing custom firmware may void any existing warranty.

Step 2: Disable Temperature Sensor Check

Log into the Vnish web GUI.
Navigate to the Advanced Settings or Miner Settings tab (depending on firmware version).
Look for an option labeled :
- Ignore temperature sensor errors
Enable this option by checking the box or toggling it on.
Click Save & Apply.

Step 3: Reboot and Monitor

Reboot the miner for the changes to take effect.
Once rebooted, the miner should begin hashing even if one or more temperature sensors are not reporting properly.
Keep an eye on actual temps using available sensors to prevent overheating, especially if the faulty sensor was your only temperature reference.

🧠 Tips and Considerations

Only use this bypass if you're sure your cooling system is effective. Without sensor protection, there's a risk of overheating if your fans or heat sinks are inadequate.
Vnish firmware also provides excellent auto-tuning and power efficiency tools—consider adjusting these for better performance.
Always monitor hashboard health and temp stats via available telemetry in the GUI.

✅ Summary

Bypassing faulty temperature sensors with Vnish firmware is a powerful way to keep aging Antminers online and productive. With just a few clicks, you can restore hashing power that would otherwise be lost due to minor sensor faults.

🔗 Download firmware and view supported models at: https://vnish.in/downloads

If you have questions or need help, Vnish also has active Whatsapp groups and support communities ready to assist.