I've been working on an ITV ice machine for two days. This is the problem: It will make ice, but it will not go into harvest cycle. It has a hot gas bypass valve for harvest purposes. I have confirmed that the solenoid is good but the line is not getting hot at all. The machine goes thru the defrost cycle on the timer but never drops the ice into the bin. I took my torch and heated up the joints and have taken the lines off and there is not any obstruction. I took it off from the compressor up to where it bypasses the TXV and there is no blockage. I have replaced the solenoid and I have replaced the timer. I do have one more Idea though: I was wondering if there is a check valve on the machine and possibly is stuck open. Any comments are welcome on this thread cause I'm Outta Answers. Thanks in advance.