The company guarantees that all products under the Ultima Cosa brand are in perfect condition and ready for use. The warranty applies only to products purchased from Back N Co., Ltd. or its authorized resellers in Thailand.

To claim the warranty, customers must present a valid receipt or tax invoice as proof of purchase. The receipt must be complete and unaltered to verify the date of purchase, which marks the start of the warranty period.

Warranty Period for Air Fryer Products
 The warranty for air fryer products is valid for two years from the date of purchase, under the following conditions:
 - If the product is found to be defective or incomplete, customers may request a replacement within 7 days of receiving the product. For defects discovered after this period but still within the warranty, the company will assess whether to repair or replace the defective parts.
 - If the non-stick coating on the frying basket or tray peels, chips, or flakes within 3 months from the date of receipt, customers may contact the company for inspection to verify that the damage was not caused by improper use or maintenance. If confirmed, a replacement part will be provided.

The warranty does not cover accessories, components, or other equipment that are not part of the product.

Transportation and delivery fees for sending the product for warranty service are not included.

The company reserves the right to amend the warranty terms and conditions without prior notice.

Damage caused by improper use or misunderstandings regarding the instructions for use and maintenance as outlined in the user manual.

Damage resulting from accidents, breakage during transportation after delivery, testing, demonstrations, installation, modifications, or repairs by unauthorized personnel.

Defects such as dents, scratches, or damage caused by external factors like transportation, accidents, negligence, exposure to chemicals, natural disasters (e.g., lightning, earthquakes, floods), pest infestations, unstable electrical currents, or incorrect voltage use.

Normal wear and tear, rust due to environmental conditions, stains, surface marks, and any external or internal component damage resulting from regular use.

If the product has been altered, modified, or repaired by someone other than the company or its authorized service personnel.

Claims for missing parts or damages reported after 7 days from the date of receipt are not covered under the warranty.

Products that are no longer within the warranty period.

In the event of a defect or malfunction, customers should contact the company's technical support hotline for initial advice. Customers should be prepared with the following information:
 - Receipt or tax invoice with order number and purchase date
 - Customer’s full name and contact number
 - Product model and serial number
 - Description of the defect or malfunction
 Technical Support Hotline: 02-279-3230, 082-796-3146 (Monday-Saturday, 9:00 AM-6:00 PM)
 Alternatively, customers can send the information via email to: support@back-n.com

For repair, part replacement, or product exchange, customers must return the complete product, including all components, to the company. The company will repair or replace the defective parts and test the product to ensure it functions properly before returning it to the customer. The company will cover the cost of return shipping within Thailand.

If the product is out of warranty or the defect is not covered by the warranty, the customer will be responsible for the cost of parts and repair services. Customers can contact the company to request a quote before sending the product for repair.