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AmerZ
Community Member
since ‎11-10-2023
‎11-17-2023

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  • 3 Posts
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Taco zvc404 connecting nest power connect

11-10-2023
I have taco zvc 404 control unit for my heating system only and I have 2 thermostat and 3 zones. How would i wire up the next power connector because I keep getting e74 code for my 2 heater thermostat. My ac is separate and the control unit has nothi...