Hi, my Honeywell thermostat CM707 is stoped working. I tried to change batteries when a little piece of metal fell apart. I do not know where it came from. I am trying
Honeywell CM707 user manual (English - 16 pages)
Honeywell CM707 Programmable Thermostat (7 Day)
Honeywell CM707 replacement with Tado Smart thermostat | DIYnot Forums