I currently have a ST-2E with 2 zones & 2 thermostats. I have a propane fired hot air furnace and a single central air unit. I would like to upgrade my thermostats to smart units which, as I understand it, will require a controller update from ST-2E to NCM-3z.
What should I be comcerned about on ...
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- Sun Mar 15, 2026 7:42 pm
- Forum: Help and Advice
- Topic: Upgrading from ST-2E to NCM-3z
- Replies: 0
- Views: 259