switch something (from something) (in)to something
to change something from one thing into another. The magician switched the silk scarf from red into green. I would love to be able to switch lead into gold.
switch something to (something else)
to change something to something else. It was hot so I switched the thermostat from heating to cooling. Mary switched the controls to automatic so she wouldn't have to worry about them constantly.
switch to something
to change to something. I am going to switch to a cheaper brand of tissues. We switched to a different long-distance telephone company to save some money.