Honeywell Programmable Thermostat Heater "low battery even replaced" Questions

...battery low, even tho it didn't say that before. We tried different batteries just in case, brand new, and still says battery low. So we are unable to set the program, or get the a/c to turn on. ...

...battery, the programmable Honeywell thermostat still shows "Low Batt." Turn control to off. Remove the batteries for at least one hour. If the display message still reads "bat lo", leave control off, ...

...low shut off temp to 130 F which means even though the heat isn't on my circulator will continue to run dumping this excess heat in the lowest part of house to rise through house. (the spring loaded ...