Cut the tip of the pacifier just a tiny bit or make a hole on the tip. When he sucks on it, this will change the "suction" on it and not make it so appealing. Do this to ALL his pacifiers...as he will probably want to try all of them so see if it "works."
There are some things you should try to avoid during the weaning process. For example, never use threats, punishment or shaming messages. These tactics will only cause your child to cling even more tightly to his prized possession.
Also, there are different view point of pacifiers and it's purpose in a child's life etc. Here are some links:
http://www.parents.com/toddlers/development/behavioral/pa...
http://healthresources.caremark.com/topic/thumb1to3
http://www.myonlinewellness.com/topic/thumb3to6
Per Dr. Joshua Sparrow (in the Scholastic Parent & Child Magazine): "Even before birth, may fetuses have already found their thumbs and gotten them into their mouths to soothe themselves. Babies learn to cope by this kind of self soothing or using a pacifier to self comfort themselves. From the very beginning of life, babies are learning to cope as they handle a range of inner sensations and environmental demands- a lifelong skill. Kids seem to cling more fiercely when they are threatened with losing control. Children will often stop on their own as they become more concerned about not appearing "babyish" to their friends, and peer pressure seems to be more effective than parental pressure."
Pediatricians will most always say to get rid of the pacifier early. They seem to not like pacifiers. Some say to get rid of it from 18 months old... some say 3 years old is a good age as they are more cognitively mature. So go figure... there are many different "rules" on this. It also varies from culture to culture.
My Pediatrician has also, at my son's 18 month check, told me to get rid of the pacifier. But, I am going to do it when I and my Hubby feel to do so. My son is 20 months now, and I am not having a problem with it. It is fine to me. In due time, we will "wean" him from it. The problem is often with other people looking at him and criticizing it. This does not bother me. I have seen other kids with pacifiers the same age as my son... and whose Mom's are not worried about it either. Everyone is different on this issue. I am sure you will get lots of feedback on this.
Good luck and all the best,
~Susan
www.cafepress.com/littlegoogoo