Thermostat on first floor showing 71°. Set for 75 thermostat on second floor shows 81°. Set for 76. Second floor thermostat has air-conditioner calling for cooling. Zoning System not working properly. Too much air going to first floor zone. Not enough air to second floor. Customer never uses the second floor. I turned off second floor thermostat for temporary cooling Service. Need to have Chris check zoning system.