If the water from your kitchen sink is only running cold, the first thing you should do is check the water supply valve. This valve controls the flow of hot and cold water to your sink, and if it's not fully open, you may only be getting cold water. Make sure the valve is completely turned on and try running the water again.Check the water supply valve
The aerator is a small piece attached to the end of your faucet that helps regulate the flow of water and prevent splashing. Over time, it can become clogged with debris and mineral deposits, which can restrict the flow of hot water. Try unscrewing the aerator and cleaning it out, then reattach it and see if that solves the problem.Check the aerator
If your kitchen sink is only producing cold water, the issue may be with your water heater. Make sure it is turned on and functioning properly. If it's an older model, it may be time for a replacement. It's also a good idea to check the temperature setting on your water heater to make sure it's set high enough to produce hot water.Check the water heater
The pipes that supply hot water to your kitchen sink could also be the culprit. Over time, they can become clogged with sediment and mineral buildup, restricting the flow of hot water. You may need to have a plumber come in and clean or replace the pipes to get your hot water flowing again.Check the pipes
If you have a single-handle faucet, the issue may be with the faucet itself. The cartridge inside the faucet can become worn or clogged, causing issues with hot water flow. You may need to replace the cartridge or the entire faucet to fix the problem.Check the faucet
If you're only getting cold water from your kitchen sink, it could be due to low water pressure. Check the water pressure gauge on your main water line and make sure it's at an adequate level. If it's too low, you may need to call a plumber to diagnose and fix the issue.Check the water pressure
Clogs in your pipes can also cause issues with hot water flow. If you have a garbage disposal, make sure it's not clogged and hindering the flow of water. You can also try using a plunger to clear any potential clogs in your sink drain.Check for clogs
If your hot water is not as hot as it used to be, the temperature setting on your water heater may have been accidentally turned down. Check the temperature and adjust it accordingly to get your desired hot water temperature back.Check the temperature setting
A leak in your hot water line can cause a decrease in hot water flow to your kitchen sink. Check for any visible leaks in the pipes under your sink or in the walls. If you do find a leak, it's important to have it repaired as soon as possible to prevent further damage.Check for leaks
If you've tried all of the above and are still only getting cold water from your kitchen sink, it may be time to call a professional plumber. They will be able to diagnose and fix the issue, ensuring you have hot water flowing in your kitchen once again.Call a plumber