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My name is Billy.
Is your furnace new enough to where it has a small automotive type fuse on the circuit board?
Thank you...do you know where your zone control box is where the thermostats wire into? And then the zone panel sends wire to the blower section of furnace?
Hello, use the paper clip icon at the right end of the tool bar to send me some photo's of zone control box... normally there is either latch or 2 screws that hold the cover on... there will a wire cable from each thermostat going into the box, and a wire for each of two dampers going out of the box, and another wire going to the furnace or air handler.
If you can locate the furnace or air handler, remove the blower door, and take a photo of the printed circuit card inside. well lit and well focused, I can point out any fuses that might be blown.