本帖最后由 kingsnake 于 2014-6-19 09:07 编辑 2 b6 _% ^% x. T% I. S# L6 I
9 X& A# R! o+ p. ]* V- c
There is nothing to do with the furnace. For this kind of thermostat, just take off the screws from top and bottom. Pull the cover off and you will see the 2xAAA batteries.