Antminer Repair
Antminer S21 Hydro Hashboard Repair Service
Antminer S21 Hydro Hashboard Repair Service
By placing your order you agree to our Terms of Service, Warranty Terms and Refund Policy.
Drop off available in Fort Lauderdale, FL (2141 NE 51st Ct).
▸How to ship your hardware
Share

Antminer S21 Hydro Repair – Fast & Reliable Service in the USA
Is your Antminer S21 Hydro miner overheating, randomly rebooting, or not detecting chips? We specialize in professional repair of S21 Hydro units with quick turnaround times and exceptional results.
🔧 Common Issues We Fix:
- Burned or failed ASIC chips
- Overheating due to cooling loop failure or sensor problems
- Unstable operation: miner constantly reboots or fails to start
- Chips not detected in diagnostics reports
📦 Important Service Conditions:
We only accept full S21 Hydro miners for repair. Due to the complex design of these water-cooled units, we cannot accept only hashboards or partial assemblies.
⚡ Why Choose Us?
- ✅ One of the only repair centers in the U.S. servicing S21 Hydro miners
- ✅ Much faster than official repair: only 4–5 business days vs. 2+ months at the factory
- ✅ Thorough diagnostics and component-level repair
- ✅ U.S.-based support and communication throughout the process
🧊 Built for efficiency but prone to overheating, S21 Hydro miners require expert handling. Our team is fully equipped to diagnose and restore your unit to full performance.
📞 Have questions? Contact us for details or to begin your repair process today.
- 5 stars: 8 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 star: 0 (0%)
I recently experienced a failure of one of the three hashboards in my Antminer S21 Pro. The board ceased functioning, and I believe the cause was overheating. I sent the board to Antminer Repair for service.
The team handled the repair with professionalism and transparency. They remained responsive and kept me informed of the status throughout the process. I also appreciate that the company is based in the USA.
After reinstalling the repaired board, I observed that it now operates at a lower temperature and delivers a higher hashrate than the other two original boards in the same miner. The improvement in both thermal performance and hashing output has been clear and consistent.
I highly recommend Antminer Repair for Antminer hashboard repairs. Their technical workmanship and communication set a high standard. I would definitely use their service again.
Hi Michael, thank you so much for sharing your positive experience! We're thrilled to hear that the repair exceeded your expectations and improved your miner's performance. We appreciate your trust and look forward to assisting you again in the future!
Hashboard is working fine after the repair. Happy with the final result.
Thank you for your positive feedback! We're glad to hear the hashboard is working well. Feel free to contact us if you need further assistance.
prompt turnaround with high level ability to troubleshoot, diagnose and rapid repair in order to get my S21XP hashboard back into service to recover losses from miner downtime. Great communication skills and honest. Highly recommend!!!
Great job, quick return and everything as up and running as it should be! Thank you!
really appreciate the level of transparency and honesty as well at the quality of work.
Aleksandr did great job repairing my S21 hashboard. I will use his service again. Very fast turnaround.
Another SUPER job!!
I love working with Aleksander. Fast repairs, super clean work.
Thank you!