Turn off the water supply valve
Flush the toilet to empty the tank
Remove the tank lid carefully
Check the flapper for wear or misalignment
Replace the flapper if it is damaged
Inspect the fill valve for leaks or malfunction
Adjust or replace the fill valve if needed
Check the float level and adjust it
Tighten loose tank bolts and connections
Replace worn washers or gaskets
Inspect the flush handle and chain
Reattach or replace the chain if disconnected
Clear any clogs with a plunger
Use a toilet auger for stubborn blockages
Check the wax ring if water leaks at the base
Replace the wax ring if necessary
Reinstall the tank lid
Turn the water supply back on
Test the toilet for proper flushing and leaks