I have an error picture on my CT-30 Thermostat. It looks like an exclamation point inside a symbol of a battery, I think. It is displayed to the right of the temperature. What does this mean?
If this is something as simple as a weak battery, why is this symbol not in the operating or installation manual?????
I tried to post a photo of what is indicated, but your editor did not allow that.
I would appreciate any advice.
Thanks