UW-Madison?s 330 or so buildings that rely on a central heating-cooling system were being provided with less than a big chill in Monday?s heat. Four of the system?s chillers were down at three power sources, putting the university?s cooling capacity at 77 percent for most of the day. One chiller was fixed Monday, another will take several days to repair, one was out for scheduled repair and the fourth was waiting for a part, said Alan Fish, vice chancellor for facilities, planning and management.