Outside unit will not come on
I have an Amana central a/c unit. The outside unit will not come on like it used to. I went outside to check it out and could hear a clicking sound. I pulled cover off the side of the unit and discovered the clicking was coming from the contactor, it clicks and tries to engage and sometimes it will engage but it takes 30 minutes or so. I can manually push it in and compressor and fan motor come on just fine but go off when I release contactor. The contact points are a little burned looking and corroded. The unit is 10 years old, should I replace the contactor or could it be somethig else? Thanks