Original post by: Luis ,
Hi I own 5 fire sticks and once in a while this happens to me as well. I do not why but you must use fresh new batteries for the pairing to be successful .. not swapping it with good batteries from other remotes . Once you insert the new batteries it should connect on its own but if not then you must hold the home button for at least 10 seconds to pair it to your fire stick. Hope this helps.