For this call I performed two out of three super tune-ups. One of the units did not have a functional thermostat and I was not able to do the tune-up due to the fact. I offered installing homeowners thermostat, they opted to call Vivint because they are the ones that installed the faulty thermostat. I spoke with homeowner about condition of the older two units they are carrier brand made in 2008 because they expressed their concern for their high utility bills. I advised owner it is likely due to the old unefficiency of the units that they are using probably original to the home I offered a comfort advisor to come and give them a energy audit of how much they are actually spending on the two older units and give estimates for replacements for both older units. Homeowner did state that they have solar energy that is not functional and that the company that installed the solar panels went bankrupt. I let homeowner know that our comfort advisor could also offer a solution for their solar