My kitchen sink and faucet is 2 1/2 years old. All of a sudden when I turn the water on, it comes out of the sprayer and not the faucet. What can be the problem? No pressure problems, just one minute it worked, the next it didn't

Did you unscrew the aerator from the spout and clean the nscreen? Can you get water out of the spout with the aerator removed? Let me know, Tom