Will the Honeywell RTH7600D thermostat work with a zone control heating and cooling system?
Do I just buy three controllers or are there specific thermostats I need to purchase?
It's a honeywell troll-a-temp.
Model MABS II 1994
The issue is with the zone controller - some zone controllers are designed to work with normal thermostats - others require special thermostats. So, perhaps if you tell us what zone controller model you have - or maybe you have the manual for the zone

If fighting your heating and cooling - and figuring out how to work those confusing controls - is getting old, the Apple vets at Nest Labs have a thermostat for you. Two Apple vets want to take control of your home heating and cooling.
After all, the thermostat on your wall is probably a blah-looking controller you face only when it's time to warm or cool the house. Unless heating or cooling is on your mind, there isn't much reason you'd turn to the digital Nest Learning Thermostat,
If the 7kW heating device were controlled by on/off thermostat control, the internal temperature would swing excessively. The automatic adjustment of heating output (or cooling output) results in a stable temperature condition, creating a far more