New answers tagged thermostat-c-wire
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The RTH9585WF should have a Rh/Rc jumper from the factory, if it is missing then you must add one. If you use the green wire as a "c" wire you need to change it on the thermostat and in the air conditioner. You will lose the "fan only" option at the stat.
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This product does not surface the C wire connection. Nor does the latest model (did those people not get the memo???)
You would have to unhook everything (good luck) and hack it off the back of the board, as Greg Hill describes.
Avoid all the terminals on the lower part of the board. They all contain 120V power. The W and R terminals there are the ...
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You'd have to inspect the green PCB and add a terminal or solder on a wire to get a C connection on this board -- it doesn't have a terminal ready for you to use.
Pull it from the housing and look at the copper traces going between the thermostat terminal block and the transformer. From one of the T1, the T2, and the T3 terminals there'll be a trace going ...
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This is a guess, but some thermostats require power to be delivered to Rc and Rh. They will usually come with a jumper wire to bridge the Rc and Rh terminals, but maybe this installer just got into the habit of using two wires because that thermostat didn't come with a jumper or it was lost, or that's just how he liked it.
There should be no reason that ...
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From your picture it looks like in reality that the yellow (Y) wire from the fatter thermostat cable connects to the red (R) of the smaller two conductor cable. All I can see is that the white (W) of the smaller cable connects to the COM (C) of the furnace board. (That wire may look yellowed because of age but I suggest that it is actually white).
The ...
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In your installation documents from Ecobee find the diagram for Taco sr503-4, that is functionally equivalent to your Argo control board. The "t" wires to the left of the diagram connect to the T terminals on the Argo board. You will need parts equivalent to a remote power supply for the Ecobee (see amazon "c wire power supply"), and an isolation relay (like ...
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Ecobee has a Power Extender Kit and a lot of documentation on what to do when you don't have a C wire. See: https://support.ecobee.com/hc/en-us/articles/360009155051-Installing-your-ecobee-thermostat-with-the-Power-Extender-Kit-no-C-wire-
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Yeah, go ahead
If you look at the Y terminal on your control module, you will notice that the pressure plate under that terminal screw is already clamping two wires, one to each side. So, this means that you are safe to slide the stripped end of your blue wire under the free side of the C terminal screw's pressure plate and call it good!
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