If your kitchen sink water won't turn on, the first thing you should check is the water supply. Make sure the water is turned on at the main valve and that there are no issues with the water supply in your area. If your neighbors are also experiencing a lack of water, then the problem is most likely with the municipal water supply and you will have to wait for it to be fixed.Check the water supply
If the water supply is not the issue, then the next step is to inspect the faucet itself. Look for any visible damage or debris that may be obstructing the flow of water. If the faucet is damaged, it may need to be replaced. If there is debris, use a cloth or brush to clean it out.Inspect the faucet
Most kitchen sinks have a shut-off valve located underneath the sink. Make sure this valve is fully open and not partially closed. If it is partially closed, it may be restricting the flow of water and causing the issue. If the valve is damaged or broken, it will need to be replaced.Check the shut-off valves
The aerator is located at the end of the faucet and helps to control the flow of water. Over time, it can become clogged with debris, causing a decrease in water pressure. Remove the aerator and clean it out with a cloth or brush. If it is damaged, you may need to replace it.Look for clogs in the aerator
If the water pressure in your kitchen sink is consistently low, it may be a larger issue with your home's water pressure. Check the pressure in other faucets and if they are also low, you may need to call a plumber to fix the issue.Check the water pressure
It is possible that there is a clog or blockage in the pipes under the sink, causing the water to not flow properly. Inspect the pipes for any visible signs of damage or blockage. If the pipes are damaged, they will need to be replaced. If there is a blockage, use a plunger or plumbing snake to remove it.Inspect the pipes under the sink
If your kitchen sink is not getting hot water, the issue may lie with your hot water heater. Make sure the pilot light is on and that the temperature setting is high enough. If the pilot light is out, relight it. If the temperature setting is too low, adjust it accordingly.Check the hot water heater
A common cause of a kitchen sink water not turning on is a leak somewhere in the system. Check the pipes, faucet, and any other components for any signs of leakage. If you find a leak, it will need to be fixed to restore proper water flow.Look for leaks
If your kitchen sink has a water filter, it may need to be replaced. Over time, filters can become clogged and need to be replaced to ensure proper water flow. Check the filter and replace it if necessary.Check the water filter
If none of the above solutions work, it may be time to call a plumber. They will be able to diagnose and fix the issue, ensuring that your kitchen sink water turns on and flows properly once again.Call a plumber