Letting the seller try to put faulty goods right also has no effect on your rights - if the repair fails, you still have any right to reject that you had when you agreed to the repair. Once you have, in the legal sense, accepted goods, you lose your right to a full refund. You can only claim compensation, and you have to keep your claim to a reasonable minimum. Normally you have to accept an offer to put the goods right, or the cost of a repair. But if the goods are beyond economical repair you are entitled to a replacement, or the cash value of a replacement if none is offered.
Some goods have manufacturers' guarantees.
These are useful when your statutory rights no longer apply. Claiming under guarantees often results in fewer quibbles than relying on your statutory rights, provided you complain within the guarantee period. Use this link for more information on guarantees . Do not be put off by traders trying to talk their way out of their responsibilities. The law says it is up to the seller to deal with complaints about defective goods or other failures to comply with your statutory rights.