Upon arrival found at thermostat did not have a display. Shut down system on the roof. Removed old heat exchanger and collector box. Installed new heat exchanger, collector box and inducer motor closed up system. Try to turn it on still is not getting any display on system. Need to have service technician come out and check out system. 1/39 - returned to get the rooftop unit started, found that there are several wire harness connections that are on the loose side. I unplugged and plugged them all back in and was now getting full power to the board and the thermostat. I cycled the unit and confirm that it is now firing up and heating properly.
