honeywell thermostat th9421c1004 wiring diagram Honeywell thermostat Th9421c1004 Wiring Diagram Valid Wiring Diagram, Honeywell Wifi thermostat & Honeywell Wifi 14 Best Honeywell Thermostat Th9421C1004 Wiring Diagram Solutions

14 Best Honeywell Thermostat Th9421C1004 Wiring Diagram Solutions

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Good enough extremely good! The very first component to do is to turn off power to both your furnace and the outdoor gadgets! We don't need to take a hazard on blowing a low voltage fuse or worse! I'll type up a scheme on the way to connect the wires together on the eim. This can take me a piece of time so please endure with me!.

You'll need some orange twine nuts to finish this installation. We are able to be connecting wires at the eim area except all the ones wires additionally visit your furnace. I might be willing to bet the twine that goes into the attic simply goes instantly on your outdoor unit however if it goes to some other piece of device, i'll want to recognize what this is and possibly a image of the wiring to it.

I see what has passed off. The present thermostat is set for "speaking" with the furnace and does no longer use the usual 24v signal like all different thermostats. The only you currently have is designed specifically for special excessive furnaces. It uses 3 "information" wires to speak. Might need rewire at furnace and at thermostat to new terminals at both ends and make a non communicating thermostat. Which by way of the manner does lower the performance.

Adequate, you could indeed refit your machine with the ecobee4. You have got a twin gasoline warmness pump machine and the ecobee4 helps this and also you also have sufficient wires in all locations to do the changeover. But, there is a distinction between your antique control gadget and the e4, your old honeywell device makes use of a stressed out outside air sensor to control twin gas (it seems to be stressed that manner and appearing the twin gasoline manage and selection making) and the e4 makes use of an internet primarily based outside temperature capture to control the dual gas approach. That is the simplest simple distinction in control method, the rest of the variations are all characteristic related.