The answer to 'faucet not working' is that there are several common causes, including a faulty cartridge, worn washers, mineral buildup, or a problem with the water supply. Symptoms may include dripping, low water pressure, or the faucet not turning on at all. Solutions can range from simple DIY fixes to more complex professional repairs.
If the faucet is dripping or has low water pressure, the issue is likely a worn washer or buildup in the aerator. This is usually an easy DIY fix - you can remove the faucet handle, unscrew the faucet stem, and replace the washers. However, if the faucet won't turn on at all or you're unsure of the cause, it's best to call a professional plumber to diagnose and repair the problem.