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Hello, is your system a heat pump with gas or electric furnace back up heat, or does the unit that sits outside run only in the summer when cooling is required.
I ask that because some thermostats have to be programmed for heat pump operation, and if not programmed, will heat when calling for cooling etc.
Tell me if that is what it seems to be doing or not, and if you want me to spend a few hours coaching you on all this or not.
We can go from there.
Thanks, ***** ***** a straight forward type of system and wiring set up, the problem is most likely related to the zone controls... so far however, the wiring errors if any are not obvious.
Is there a jumper between Rc and Rh... if so that is how it should be.
I need the full model number of the COR thermostats, just 'COR' is not enough. Meantime look at the programming instructions, you may have selected 'heat pump' as the system type instead of 'conventional system'
If I miss you tonight I will pick your response up in the morning.
Thanks, ***** *****'t see any potential problems with the way you wired the thermostats.... can you give me the brand and model number of the zone controller these connect to? Or a photo of the thermostat connections to the zone controller.
Use the paper clip icon at the right end of the tool bar to attach the photo's please.
Thanks, ***** *****'t see a problem with your thermostat wiring, there is must likely some conflict at the zone control box, get me those pictures I will look them over tomorrow please.
Locate the zone control box by finding the thermostat wire connections in the furnace and following that wire back to its source.
See you in the am or whenever you get back.