Tech did not get a Y call to unit from thermostat. Tech jumped unit out and it came on. Tested 40/7.5 dual capacitor and found it reading 11% weak at 35.7uf on HERM side and 30% weak on FAN side at 5.3uf. There is no common wire connected behind thermostat. Tech replaced AA batteries for testing. No change. Tech found Yellow wire broken. Tech connected Black instead of Yellow for Y circuit and connected Blue for common instead of having batteries. System is back cooling after swapping thermostat wires. Burners lit in heat mode, but took 2 tries. Burners need to be cleaned. First visit in six months. Wants to alternate services upstairs and downstairs. Each system once per year. Replaced capacitor and collected for repairs.