Wired up the Thermostat per the instructions and all I’m getting is a clicking sound. At the unit that Blue wire is spliced to another Blue wire that disappears into a wiring bundle with at least two other Blue wires.
Near as I can tell the Blue wire from the Thermostat goes to a separate wiring block,
but I’m not sure where it goes from there or if I need the C-Wire adapter or how to wire it in. The Thermostat wire block doesn’t have a Blue attached to it.
I tried to post the images inline with the text for a better description/visual but as a new user I can only embed a single image and can only include two links???
Any assistance would be greatly appreciated…I’ve searched and searched but haven’t been able to find anything that matches.
Everything looks good. I suppose it could be a loose, or damaged C wire. To eliminate this possibility you could use the C adapter.
To do that , you would connect it as follows:
and tell the wyze during setup that your “old thermostat” has the following wires:
Rc,
W
Y
G
Note that the green wire goes to G on the C adapter and C on the wyze in this configuration.
If that still doesn’t fix the problem, the transformer might just be underpowered, but as replacing that requires dealing with high voltage, it’s generally something you would want a technician to do.
Thank you so very much for sharing your knowledge and expertise! It is greatly appreciated! I’ll give the C adapter a shot, hopefully this evening and will post my results.
Again, thank you!!!
Well, still no joy. Is the next step to replace the transformer? Is there a way to test it to be certain it’s weak? I’m comfortable working with electricity.
Well, I was hoping that your transformer had a VA rating sticker on it, but it doesn’t. it looks like it’s probably a 40-50VA transformer, but I can’t be certain without a tag.
It takes 240VAC (primary) and converts it to 24VAC (secondary)
Generally I’d recommend going up 20-25VA for adding a smart thermostat if your transformer is weak. ex: if you have a 20, go up to a 40, if you have a 40, go up to a 60, if you have a 50, go up to a 75.
You might have a defective thermostat though. I don’t suppose you have a known working 24V transformer that you can test? If you hook up just the Rc and C terminals to a known working 24V transformer, the thermostat should at least power on. I’d do this test first before replacing the transformer.
If you don’t have a different transformer, you could try hooking up the thermostat directly at the furnace, just to see if it powers up there, without the resistance of the thin thermostat wire added in. even with a weak transformer, the thermostat should power up if you try to connect it directly to the furnace. If it doesn’t, you likely have a faulty thermostat or your fuse is blown.
Additionally, if you have a multimeter, you could test the red and blue wires at the thermostat mounting point in AC voltage sensing mode and see what voltage your thermostat is actually receiving (red and green if the C adapter is still hooked up on the other end) - It should be between 23.5 and 36 VAC - if it’s lower than 23.5 V, then you either have bad thermostat wires or a weak transformer.
Just don’t short the R and C wires together or you will need to replace that fuse on the furnace controller board.
Thank you again! Unfortunately, I do not have a known good transformer that I can swap out. I did put a meter on the Rc and C Wires at the thermostat and am only getting less than 3 Volts. As soon as I can, I’ll test the transformer at the outside unit for output… I found a tutorial online on how to do that
I apologize for taking so long to test the transformer…
The blade labeled 24v is putting out slightly more than 24v and the other blades are putting out their proper voltage as well.
I’m wondering if my wire between the transformer and the thermostat is bad or shorted out somewhere? The only other thought is I got a bad thermostat?
you can always follow the wire out of the furnace and see if there is a splice somewhere. but you might just have a bad wire. The C adapter should have worked though, if you have proper voltage at the furnace.
Ok. Thank you for all the advice and help! I’ll try tracing it from the transformer and see what I can find. There very well may be a splice somewhere between the transformer and before where I wired the C adapter in. That could also explain the low voltage on the C wire at the thermostat, correct?
