My TCP had a similar bug where AC was blowing warm air.  I was playing with the HU when it happened.  AC button on screen was activated. Had to deactivate AC by pressing the button and then press on again to get cold air back.  Only happen once so far.  Don't think it's compressor related but bugs on the TCP HU that causes this.  Have you all tried pressing AC button on screen Off then On again to get cold air back?