Performed diagnostic. Upon arrival, client’s concern was that unit wouldn’t go passed 70 and when they open both zones, 1 zone feels like it’s closed. I fired both zones up, both opened properly. Temp rises were within specs on both sides. Temp went up to 73 inside. Closed both zones and both closed properly. No issues present. Client has rental property and we have estimate on duct replacement. They want to pull forward with it ASAP.