I'm interested in this mod I was thinking of buying this kit off ebay before I read this post!
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1,1&item=8077423794&sspagename=STRK%3AMEWA%3AIT
I'm new here but my 99 has the same problem and My neighborhood Ford Expert says it could be conections at the inline switch near the compressor! If its not cooling wiggle the connector and if the compressor kicks on that is your problem!