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- Wed Apr 19, 2023 8:02 pm
- Forum: Help and Advice
- Topic: ST-2E to NCM-300 - Extra wires
- Replies: 1
- Views: 5808
ST-2E to NCM-300 - Extra wires
Hi everyone, After reading other experiences regarding the upgrade from the ST-2E to the NCM-300, I decided to give it a shot myself and save some change. I've received the new controller and am accounting for each wire on the current setup, as I understand it to be a 1:1 swap. On the thermostat sid...