Unless your husband is licenced in a/c repair he's probably not going to have the proper equipment to do the job without just releasing the freon into the atmosphere which carries a huge fine (up to $25000. I think) if caught and it is also against federal law for anyone who is not licensed to open up the a/c system. Sorry this isn't pertaining to your question, but just thought if you didn't know these things you should be made aware of the risks involved.