The answer to 'faucet no hot water' is that the most common causes are a malfunctioning water heater, a problem with the faucet's internal components, or a blockage in the hot water supply line. Symptoms may include only cold water coming out of the faucet, the faucet feeling hot to the touch, or the water temperature fluctuating between hot and cold.
If the issue is with the water heater, you may need to adjust the temperature setting or repair a faulty heating element. For problems with the faucet itself, you may be able to fix it by replacing washers, springs, or other internal parts. A blockage in the hot water line could be caused by sediment buildup and may require a professional plumber to clear the line.