## Troubleshooting and Repairing a Kohler Kitchen Sink Faucet
### Common Problems and Solutions
#### 1. Leaking Faucet
**Cause:** Worn-out washer or O-ring
**Solution:**
1. Turn off the water supply valves under the sink.
2. Remove the faucet handle by unscrewing it with a screwdriver.
3. Remove the packing nut located beneath the handle using an adjustable wrench.
4. Replace the old washer or O-ring with a new one.
5. Reassemble the faucet in reverse order.
**Cause:** Loose spout
**Solution:**
1. Tighten the spout nut with an adjustable wrench.
2. If the nut is stripped, you may need to replace the spout.
#### 2. Stiff or Loose Handle
**Cause:** Worn-out cartridge
**Solution:**
1. Remove the faucet handle as described above.
2. Use an Allen key to remove the cartridge retaining screw.
3. Pull out the old cartridge and insert a new one.
4. Replace the retaining screw and tighten it.
**Cause:** Loose handle screw
**Solution:**
1. Check if the handle screw is loose.
2. Tighten it with a screwdriver.
#### 3. Low Water Pressure
**Cause:** Clogged aerator
**Solution:**
1. Unscrew the aerator from the end of the spout.
2. Rinse it under running water or soak it in vinegar to remove any debris.
3. Reinstall the aerator.
**Cause:** Clogged supply line
**Solution:**
1. Turn off the water supply valves.
2. Disconnect the supply lines from the faucet.
3. Check for any kinks or obstructions in the lines.
4. If necessary, replace the supply lines.
#### 4. No Hot Water
**Cause:** Faulty mixing valve
**Solution:**
1. Turn off the water supply valves.
2. Remove the mixing valve cartridge by unscrewing the retaining screw.
3. Inspect the cartridge for any damage or wear.
4. Replace the cartridge if necessary.
**Cause:** Clogged hot water heater
**Solution:**
1. Check if there is hot water coming from other fixtures in the house.
2. If not, the problem may be with the hot water heater.
3. Contact a plumber for assistance.
#### 5. No Water at All
**Cause:** Shut-off valves closed
**Solution:**
1. Check if the shut-off valves under the sink are closed.
2. If so, open them fully.
**Cause:** Frozen pipes
**Solution:**
1. Locate any exposed pipes and apply heat using a hair dryer or heat gun.
2. Once the ice has melted, gradually increase the water pressure to avoid bursting the pipes.
**Cause:** Failed faucet body
**Solution:**
1. This is a major repair that requires replacing the entire faucet body.
2. Contact a plumber for professional assistance.
### Preventive Maintenance Tips
* Regularly clean the aerator and remove any debris.
* Inspect the O-rings and washers for wear and replace them when necessary.
* Tighten any loose connections or screws.
* Flush the hot water heater annually to prevent sediment buildup.
* In cold climates, insulate exposed pipes to prevent freezing.
### When to Call a Plumber
* If you are unsure about the cause of the problem or the repair involves electrical components.
* If you have attempted repairs but the faucet is still malfunctioning.
* If you notice significant leaks or water damage.
* If you cannot turn off the water supply valves.