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YC1978
Community Member
since ‎12-03-2022
‎12-06-2022

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Wiring for Nest without R wire on the furnace

12-03-2022
We have a Thermolec TH600-D which has C and W1 (plus other terminals) but no R. Nest requires all 3: C, W and R. Can you advise on how to wire in this situation or which accessory to purchase (connector, transformer)?