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Checked no cooling complaint that the first and second floor zones had stopped working, found first floor and second floor zones calling and dampers are open. The second floor shut off thermostat set to 78 satisfied. Lowered temperature to 70, cooling 2 came on, checked zone board, have y1and y2 call from second floor thermostat, zone board sent y1and y2call to the heat pump, heat pump is running on second stage. Checked temperature drop. Only problem found was the second floor thermostat was set high.