11-10-2023 04:39 PM
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 nothing to do with it. If anyone is familiar with this set up would appreciate how to install the nest power connector
11-10-2023 05:01 PM
11-12-2023 09:55 AM
Hi AmerZ,
Yikes! Let's get this fixed for you.
You can install the power connector yourself or call a pro. For a brief video of the installation process, go to How to install the Nest Power Connector. The Nest Power Connector comes with instructions in the box. Follow those instructions to install the Nest Power Connector. You can find the same instructions in this Installation Guide or follow these direct instructions:
You can install the power connector yourself, or call a pro. For a brief video of the installation process, go to How to install the Nest Power Connector.
Let us know how it goes.
Best,
Zoe
11-12-2023 02:00 PM
this is my control box of the heating system and this wiring here does not look neat to figure out where is a common wire C ,
11-13-2023 07:47 AM
Hi there,
Gotcha. Your system is a complex one; therefore, I recommend you contact a professional installer for better assistance following this Pro Installation Guide.
Thanks,
Zoe