Complete 3 Systems worked on Gas Furnace in the basement. HO ststed tstat was blank but suddenly numbers appered on the screen. Checked system out. Cycled system. Checked blower motor amp draw and cap. Checked all electrical wiring. System came in every time I cycled it. This is a 90% gas furnace so Inchecked and made sure all drains from gas furnace were clear. No issues found. HO requested me to replace tstat with a basic tstat. Used a non prog proselect tstat from truck stock. Charged HO Level 2 + tax. System is running great at this time.