hoosierboy wrote:

I just bought a new house and have a Honeywell Chronotherm IV Plus
battery replacement flashing in the screen. Problem is I cannot figure
out where and how to get to the batteries. Can someone please tell me
in laymans terms what I need to do to replace the batteries. What
needs removed etc. Thanks in advance.

Hi,
It has bottom half swing down door to get at buttons, right?
Close the door.
Now you have to pull out the control panel which is clipped onto base.
Grasp the panel with both hands and gently pull/swing up/ It'll come
off. Replace batteries and do the revers to put the panel back.
And check the time and program setting in case it is disturbed(very
unlikely)
If you go to Honeywell web site, you can download manual.
Good luck,