Performed semiannual maintenance on one heat pump heating system. Inspected all Performance, Mechanical and Safety systems. Homeowner mentioned that the heat pump and auxiliary heating was having a hard time maintaining 72° during the snow day we had. I found that the thermostat was not connected to WiFi so I went through and manually staged the heat pump and heating elements on the service menu of the thermostat to help with heating inside the home. I also adjusted the comfort profiles as they were set to the factory settings of a 64° heating temperature for sleep mode and an away temperature of 62°. I also disabled the “Follow Me” function that switches the thermostat over to Away mode. Once the changes were made, I was able to achieve a 136° supply air temperature at the supply air plenum in the attic. Everything is working at this time.