I agree with the wetting balance test. You may have pads or components that have oxidation, in turn needing a more active flux (high halide content) to successfully wet. There may also be some intermetallic growth in your soldering area. If you need some help with setting up your parameters for your wetting balance or need help with the graphs, you can contact me direct or off line. Virgil Minor [log in to unmask] 1-800-527-4549 x113 ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################