Complete PMAC. N/C, CCM. Replace the existing I comfort thermostat with a Honeywell t4 programmable thermostat. Since an icomfort thermostat is not being used the thermostat wires on the board will need to be switched to the R,G,W,Y and C terminals. Also a humidistat will also need to be installed since we are removing thermostat that controlled the humidity. 5/5/23-PT- upon arrival the thermostat was set for heat. I powered down the thermostat. I powered down the system and removed the access panel. I removed the existing icomfort thermostat and installed a new T4 thermostat serial #2247JJB05061 . I changed the wiring at the furnace control board as well as at the condenser. I also installed a new humidistat for the Aprilaire 600 series humidifier. Once the humidistat and thermostat were both installed I powered the system back up and called for heat to test the humidifier. The system and humidifier started without any issues. I ended the call for heat and performed AC preventative