Finding the perfect hair straightener that really works well with your hair is quite a feat. When that straightener stops working, you can be desperate to get it to work again. Some problems with hair straighteners may be as minor as removing and cleaning the plates. Other problems can be much more technical that you shouldn't try to fix yourself. Trying to fix a hair straightener yourself can make the warranty invalid.
Diagnose the problem. If the metal plates still get warm but not hot, it could be gunk that has built up behind them.
Clean behind the plates. Remove the plates by removing the small screws that hold them in place. Clean the area and reattach the plates. Plug in the straightener and see if it works. If the plates aren't doing anything at all, it could be the power.
Check your warranty. Most devices come with a manufacturer's warranty. Ensure that you are still in your warranty time frame.
Call the manufacturer and discuss your problem. Depending on the manufacturer and the problems associated with the straightener, you may be sent a return package so you can ship the item. Most manufacturers will require that you send the item back to them with proof of purchase and the warranty card.
Package the straightener and send it back to the manufacturer. Send the item with some type of signature service. This will serve as proof that you sent it, in case it gets lost in transit.
Check with the manufacturer frequently for updates on your device. Most will give you a time frame for when you can expect the device to be shipped back to you.
Tips
Some have had problems with getting devices like CHI and GHD fixed without an additional charge. Check with your dealer to see about the lifetime warranty if the manufacturer is trying to charge you a fee. Do not remove the plates if it breaks the warranty sticker. Check with your manual that came with the device on solutions to common problems.