EWC-ST-2D to NCM-300
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Hunter1020
- Posts: 1
- Joined: Tue Oct 14, 2025 4:10 pm
EWC-ST-2D to NCM-300
Looking to upgrade my control board so that I can use smart thermostats for both zones in my home. I read through the ST to NCM 300 manual/drawing and saw that a WiFi thermostat isn’t possible with only 3 wires at zone 2 so I was wondering what I could do to make it work so that both zones could use a smart thermostat. Attached are pictures of the control board and each thermostats wiring.
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