u/bam905

Hey, I installed a Nest thermostat yesterday and it was working fine other than not being able to connect to the app due to "low battery" Well i woke up at 5am and the house is at 30°c. The Nest said cooling on the display but full heat was coming out of the vents. Lucky I still had my old thermostat, I re installed it for now and am getting cold air. Anyone ever have this issue before? Thanks