I have two separte knobs for my kitchen faucet and the one with the warm water stopped working. It keeps dripping and it won’t shut off so I turned off the main warm water valve below. Also the cold side makes a loud vibrating noise when I turn it on full, it works fine though. So do I need a new faucet or is there a way to fix this? By the way, this one is only about 8 months old.

Contractors putting in windows broke the previous one and replaced it. It’s a single handle faucet. We only get cold to warm water now, no hot.