Aguarn

A guarantee:Is usually free
It's a promise to sort out any defects with a product or service within a fixed period of time.
It's a legally binding contract, even if you didn't pay for it. 
It must explain how to go about making a claim in a way that is easy to understand.
It should add to, not take away from, your rights under consumer law.
It works whether or not you have a warranty.
A warranty:
A warranty is like an insurance policy that you must pay a premium for. 
Sometimes it's called an 'extended guarantee'
It might cover a longer period than a guarantee, and it might cover a wider range of problems.
A warranty is a legal contract, so you can take the company to court if they don't honour it.
The terms of the contract should be clear and fair.
Having a warranty doesn't diminish your rights under consumer law.
A warranty can run alongside a guarantee.

According to the 1985 Moss Magnuson Act, warranty and guarantee are the same thing.
A guarantee is a document to protect consumer rights. It is a promise by a seller with a buyer for complete replacement of the item/ article or product; usually guarantee is valid for a fixed period of time. It has a legal status, even if we do not pay for or it was offered free of cost by a seller.
Warranty is also a document that protects consumer rights. It is more or less like insurance policy for that we have to pay certain amount to come into legal contract. So on the basis of this legal bond the company can be taken to court if it does not bound what has been agreed in the warranty document. Warranty covers only repair of the article.
Guarantee is more in manufacture, Warranty is more in distribution and reselling parts; for example, a company manufacture a scooter is liable for manufacture guarantee,on the other hand, some importer or distributor resell the products will use warranty
A guarantee is giving you their word (kinda like an empty promise.) A warranty is in writing that they will correct any...