I have a moan single valve tub valve with no cold water. After 7 years of use

No cold water in my single handel moan tub valve. It has worked for 7 years

Hi and Welcome to The Plumbing Page. At AskMeHelpDesk.com. You piggybacked on to a anthers thread so I gave you one of your own.
Turn the water off tom the valve and remove the cartridge. Check and clear the inlet port. Now turn on the water for a moment to flush out then supply. (you should see a strong stream when you do this. Reassemble and test. Good luck. Tom