Tech was there for 30 minutes. Worked for 3 it seemed. Just gauges and I had to ask him to hook them up. He say it was making a whinning sound. All the fans around here do that. I have been reading post tonight trying to find out information and apparantly the motors to the fan over the compressor dry out. Also no ice on any lines and one line feels cool and the other warm. Nice person but his back was hurting today.