Bought house with nest thermostat 2 yrs ago. It did NOT keep the temps according to what was programmed. Was always a pain and had to adjust constantly! Now it finally broke down- only three yrs old. Good riddance. Even our HVAC tech said they have a lot of problems with the nest. Back to Honeywell thermostat ( had on last house.) They know AC’s and work great!Google stick to search engines, because even that isn’t as good as it used to be!