1.A 180-day warranty is provided from shipping out date. To avail this warranty,a Repair ticket must be generated by the customer on Bitmain's website
Overclocking the miner will void the warranty immediately.
You could check the warranty by the link below：
2. All sales are final. No refunds will be given. Defective machines can be repaired for free under the Bitmain warranty policy. After the warranty period, machines can be repaired for the cost of parts and labor.
3. In some cases, the warranty will be void, but Bitmain can still do repairs at your own expense if requested. The following events will void the warranty:
a. Customer removes/replaces any components by himself without receiving permission from Bitmain first;
b. Damage caused by poor power supply, lightning or voltage surges;
c. Burnt parts on hash boards or chips;
d. Miner/boards/components damage due to water immersion or corrosion due to wet environment.
4. Customer must return the defective parts or whole miners at own expense after opening a support ticket and troubleshooting with Bitmain's instructions.
5. If you notice there are some loose in small heatsinks, please write to
about the case within 3 days after the package is signed showing in UPS/DHL/FEDEX's website.
Bitmain does not cover any loss of down time or delay caused by customs. Bitmain will cover shipping cost when shipping a replacement unit within the warranty period.