I recently replaced the batteries in the thermostat and when I put them back. The temperature starts going down to around 10 degrees therefore I cannot get the AC to come on at 70 degrees because it is saying is already 10 degrees.

I recently replaced the batteries in the thermostat and when I put them back. the temperature starts going down to around 10 degrees therefore i cannot get the AC to come on at 70 degrees because it is saying is already 10 degrees.

You have to reprogram the settings... this is one thing I dislike about the fancy thermostats... they lose all settings when the batteries are removed to replace than every year.