Repair Guide · Antminer Z15 · Antminer Z15 Pro · Warranty · After-Sales Service
Antminer Z15 / Z15 Pro Repair: Bitmain Official Service vs. Independent Repair
When a Z15 or Z15 Pro stops hashing, every day offline is lost Zcash. Bitmain's official after-sales service and independent repair shops both fix these machines, and each fits a different situation. Here's an honest comparison of warranty, logistics, turnaround and repair depth, so you can pick the right route for each unit.
- 180 days
- Bitmain miner warranty
- Jun 2023
- Z15 Pro release
- 1–3 days
- Typical solo-miner repair
- 1–2 weeks
- Typical small-batch repair
Two ways to fix the same Z15
The Z15 and the newer, higher-output Z15 Pro (840 KSol/s, released June 2023) are still the backbone of most Zcash farms. Sooner or later every fleet has dead boards, overheating units and failed power supplies, and owners face the same question: send it to Bitmain, or use an independent repair shop?
Neither answer is always right. The deciding factors are your warranty status, how many units are down and how much each day offline costs you.
How Bitmain's official after-sales works
Bitmain's after-sales process is clearly documented on its support site, and it is the natural first stop for any unit still under warranty:
Step 1
Check warranty
The standard warranty is 180 days for miners and 365 days for power supplies. A repair ticket must be created before it expires.
Step 2
Open a ticket and send logs
Support reviews the fault and the logs you provide before anything ships.
Step 3
Wait for approval
Units are shipped only after the ticket is approved.
Step 4
Ship to an authorized repair center
You package and ship the miner, and the return trip adds more transit time.
Step 5
Repair and return
In-warranty repairs are free. Out-of-warranty repairs are charged.
Bitmain is the manufacturer and knows these machines inside out. For a unit that is still under warranty, this is the right route — the repair is free, and it keeps your warranty intact.
Where independent repair is different
Most Z15s and Z15 Pros running today are past the 180-day warranty. At that point you pay for the repair either way, and what usually matters most is how quickly each unit gets back to hashing and how well the service fits the way your operation runs.
Best for
Units still under warranty
Out-of-warranty units and fleets that cannot wait
Cost
Free in warranty; paid out of warranty
Paid, with an itemized quote before any work
Before work starts
Support ticket with logs, reviewed before shipping
Send the model and symptoms; we diagnose and quote
Typical turnaround
Depends on repair-center workload and shipping
Solo miners 1–3 days; small batches within 1–2 weeks
Logistics
Ship to an authorized repair center and back
Mail-in within the USA, or on-site with no shipping at all
Communication
Through the support ticket
Directly with the technicians working on your boards
Repair approach
Manufacturer repair under Bitmain policy
Chip-level: individual chips, power rails, connectors and sensors
Units in a farm or hosting site
Units are removed and shipped to the repair center
Can be repaired on-site, with the host’s permission
Why on-site repair matters most for Z15 fleets
For a single miner, shipping is an inconvenience. For a farm with dozens of Z15s, it is the biggest cost of repair: every unit sits idle through packaging, transit both ways and time on the repair bench.
On-site repair takes shipping out of the equation. Our technicians bring the test fixtures and rework equipment to your floor — or to your hosting facility, with the host's permission — diagnose boards in place, repair what can be repaired on site and put units straight back on the rack. If your Z15s are hosted with a third party, you don't have to pull machines out and arrange freight yourself.
A simple rule of thumb
- Still under warranty? Open a Bitmain ticket first. The repair is free, and opening the miner yourself or using a third party can void the warranty.
- Out of warranty, one or two units? Mail-in independent repair is usually the faster path — a solo miner typically takes 1–3 days with us.
- Out of warranty, a batch or a hosted fleet? On-site repair avoids shipping entirely; small batches are typically finished within 1–2 weeks.
What we repair on the Z15 and Z15 Pro
The Z15 Pro runs noticeably hotter than the original Z15, so heat drives most of its failures. We repair the full range of Z15-family faults at the chip level:
Every repaired board runs a full-load burn-in before it goes back to work. For specific faults, see our guides to Z15 zero hashrate and missing chips and Z15 Pro overheating and Temp NG errors, or go straight to the Z15 and Z15 Pro repair services. Running a larger fleet? See how our on-site repair workflow works.
Frequently asked questions
Is my Antminer Z15 or Z15 Pro still under Bitmain warranty?
Bitmain's standard warranty is 180 days for miners and 365 days for power supplies, and a repair ticket has to be created before the warranty expires. The Z15 Pro was released in June 2023 and the Z15 earlier, so most units in the field are now outside the original warranty. Check your purchase date and Bitmain's support site to confirm.
Can Bitmain repair a Z15 that is out of warranty?
Yes. Bitmain repairs out-of-warranty products for a fee. You open a ticket, provide logs, wait for approval, then ship the unit to an authorized repair center.
Will an independent repair void my Bitmain warranty?
It can. If your Z15 or Z15 Pro is still within Bitmain's warranty, use the official warranty service first — it is free. Independent repair makes the most sense once the warranty has ended.
How long does an independent Z15 repair take?
At Frontline Hash, a solo miner is typically repaired in 1–3 days and a small batch within 1–2 weeks, depending on the fault and parts. With on-site repair there is no shipping time at all, and you can talk directly with the technician working on your boards.
My Z15s are in a hosting facility — can you still repair them?
Yes. With the host's permission, our on-site team can repair Z15 and Z15 Pro units at the facility where they are hosted, so they don't have to be pulled out and shipped.
Z15 out of warranty?
Get your out-of-warranty Z15 back online fast
Solo miners typically in 1–3 days, small batches within 1–2 weeks. Chip-level Z15 and Z15 Pro repair, quoted before any work — mail-in or on-site.