How do you fix laundry room faucet that wont shut off?

To fix a laundry room faucet that won't shut off, first, turn off the water supply to the faucet to prevent flooding. Next, disassemble the faucet by removing the handle and any retaining nuts to access the cartridge or valve. Inspect the washer or cartridge for wear or damage, replacing it if necessary. Reassemble the faucet and turn the water supply back on to check if the issue is resolved.