Arrived on site customer stated that the heat was constantly running and they had changed the thermostat. Upon inspection found that the thermostat was installed wrong and they had the white wire in the green terminal. Rewired and everything appears to be in working order. After explaining how the Navien works and servicing customer decided that they would like to move forward with replacing the condensate line and installing a water conditioner along with a new valve for the outside hose spigot. Performed all work stated above and everything appears to be in working order and there appears to be no leaks at this time. Installed customer supplied shower head as a courtesy as well.