Arrived and discussed issues with customer. I went threw both nest and turned off all eco setting,turned of nest presence settings and removed all possible scheduling. Customer allowed me to use his phone for the nest app and I turned off everything. They are set to as close to a set it or forget it as nest will allow. Thermostat kept going into away setting/ programs thinking the customer had left the house. Both thermostats are set to cool and propane functioning grew the app at this time.