Found system running . Unit was running in first stage heat and not going into second stage due to a lose wire . Fixed connection and tested operations . Checked economizer and made sure it was closed . Return air 60 and supply air 84. Temp rise on machine is rated for 15-40 and we at 24 . Checked operations on second unit due to both reading 62 in front area and set for 72 . System is operating and just couldn’t keep up with other system running in first stage only .