exchange

替える(かえる)	(VT) Switch from one thing to another thing – usually of a different type:(switch channels / modes / clothes / sides)

換える(かえる)	(VT) Exchange (yen for euros) change (diapers / a broken heel on your pumps). Unlike the other かえる　(替える）、換える means you are exchanging something for a similar or identical thing.

代える(かえる)	(VT) Not used.