See Art. 16 Warranty (General Conditions)
Art. 16 Warranty
1. BQS guarantees the reliability of its work and / or the delivered goods, with the understanding that BQS as a result of improperly performed work or not properly delivered goods for 3 months after completion of the work and / or delivery of the non-reliable goods will re-execute the agreed work and will replace or repair the items in question at the discretion of BQS. This only applies insofar as the liability of damage is not excluded in these general terms and conditions.
2. Defects that have arisen due to normal wear caused by improper or incorrect use or maintenance or after a change or repair made by the client / buyer or by a third party without the permission of BQS and / or commissioned by client, copper materials or methods used are not covered by the guarantee.
3. Warranty claims only exist if the client / buyer has fulfilled all its obligations towards BQS (both financially and otherwise) in time and in full.
4. In the case described in paragraph 1, the client / buyer must ensure that BQS can carry out the work originally agreed upon again.
5. If the client / buyer can rely on a manufacturer's guarantee provided by the manufacturer and / or supplier of the delivered goods, this guarantee will apply between the parties, in the understanding that the guarantee given by BQS can never have a larger size than these guarantees.
6. The present general terms and conditions apply equally to repair or replacement.
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