I am using alkaline batteries. I am not where I can remove the unit from the wall. I suspect that the wiring is not right because the technician who installed it told me it did not need a battery. Please send me detailed instructions on how the wiring should be to insure that the battery holds the settings and does not run down the battery so quickly. I'll fix it myself.
I repeat. The brand is Carrier. Waiting for a response.
It shows me a battery icon on the screen. This is a seasonal residence. Used occasionally. If I set the heat on HOLD and return after a month I find the battery icon with an X throught it and the the thermostat returned to the factory default, 68 F. In the winter this is bad because it runs my heating bill up while the house is unoccupied. There has most likely been a power failure while we are not there.
My seasonal home has internet but that is not reliable either because of the frequent power failures in the Winter - ice and snow play havoc with the cable. Carrier tried to interest me in the WI-FI but I'm not sold on it for this application.
Are you sure that no programable thermostat is going to work under these conditions? Carrier says they have a thermostat that does not require a battery. How does that work? To my knowledge any electronic device that needs backup during a power failure requires a battery even if it is built-in.
Thanks for your help.