Came out to call to address issue with upstairs thermostat. Customer stated the thermostat was not operating properly, even after changing the batteries. Found the R terminal on thermostat not allowing power into the thermostat. Jumpered wires to ensure there were no issues with the wiring. Discussed with customer about replacing thermostat, and went over options. Customer wanted to replace both the upstairs and downstairs thermostats with the Honeywell T6 programmable. Took old thermostats off the wall and installed the new ones. Set up thermostats according to equipment and operations. After I set the thermostats up, I went over programming with customer and set up program for them. Showed customer how to operate the thermostats and also tested all functions to make sure equipment was operating properly. Discussed with customer about maintenance plans for the units and the benefits of having them on a routine to decrease breakdowns and keep them running efficiently.