Arrived at location on 10/8/21 - found unit on when here and heating. Customer using unit, will call back if unit goes down over weekend. If not will return Monday to see if can find anything wrong. Returned to location on 10/11/21 - return cycled unit on from cold start and checked cooling fans working. Unit read open on display. Played with temp probe wire, went away. Cut back wires at controller and stop reading open, unit came up to temp.