Customer called and said that Downstairs t stat went blank and upstairs wasn’t cooling. I went to the Damper at the indoor unit that feeds the upstairs ducts. It was closed. We need to change out that damper, the motor is failing. The outdoor unit wasn’t coming on when i called for cooling on the upstairs t stat. I took the face off of the downstairs t stat and replaced it with the face from the upstairs tstat. The units started cooling properly. I left the upstairs damper stuck open to let air in upstairs. I also informed the customer that his t stat for his downstairs unit was bad. He is going to purchase a new EcoBee tstat and change it out himself. We need to call and give him an estimate on a new zoning damper. Collected $85