Index Hot Jpg Hot Water Problems?

Hot water problems? - index hot jpg

Ok, I was here with a view to the next question:
http://answers.yahoo.com/question/index ...

What cartridge? What is a thermocouple? Why not come on thats hot water tap closest to the boiler?

Based on the answers that I nowhere in sight, clean them with a photo of the teeth. So I took a picture ... http://i48.photobucket.com/albums/f245/E

I feel aa few drops of warm water, not hot. Also removed before the water is turned off when the lever, the path is on the warm side.
A few things added: I have all the other taps work home, I have two bathrooms, I have no need to use the bathroom for about 2 years. That is why I have not settled. Please someone can help.