Hey Kenny, did you switch RH to RC? Did it work?
Just to be clear, you need to first make sure you have 24V AC going between blue wire and Red wire. If you do then plug red into Rc and it will turn on. The Thermostat uses the RC lead to complete the power circuit, not the Rh lead.
Hope this helps you guys.
We got it working. Thanks!
I have a power on problem with new Wyze Thermostat. My furnace does have C wire, and I have hooked it up, and verified that there’s AC power between R and C wire (27.3v to be exact). Yet, I can’t seem to have Thermostat turn on. I even tried with only Rc and C wire connected, with voltage running, to be sure, but still no power.
Not ruling out a dud, but would like to keep Wyze rather than trying Nest.
BTW, there seems to be voltage between Rc and Y and W as well. Not sure if this is normal.
Unfortunately, I think it was Wyze unit that was a DOA. I should have figure out that after being connected for an hour, the unit was getting slightly warm, even though screen was not on. Nest on the other hand, powered on right away.
It is unfortunate, since I do believe in Wyze story, and want to keep all home automation under one app instead of buying into expensive Google/Amazon story. I may still request replacement to give Wyze Thermo another try…
I am having similar issue with no luck
So I hooked up Rh to Rc still did not work. I bought 24v plug service off Amazon for 18 bucks when I unhooked the Rc and C wire to hook up to exterior power source the C wire basically fell off, is was broken in the casing. I stripped the wire hooked up to C and Rc and poof it worked. NOT A DOA UNIT WORKS FINE. Thanks Wyze and everyone that responded to my questions.
Thermostat wont power on. Connected all wires to corresponding letters. The old stat was the same as the wyze app gave me for letter to letter. Have C wire. Checked behind handler panel all wires connected. Pic attached of old stat only thing i can think of is there is a little copper bridge betwwen Rc and R. Please help.
I had the same issue. Totally missed that sticker change. Without this issue the install would have taken less than 20 minutes.
I have a c-wire on old thermostat but not working when I connected to my new wyze unit. Installed the c-wire adaptor at the furnace and came back to the wyze unit and disconnected the c-wire. Nope didn’t work. At this point I should have gone back to the app and restart the installation instructions. Thankfully the posts here were extremely helpful… G wire to C on the wyze if you are using the adaptor. Voila ! It works like a charm.
You will need to use the adapter.
Move the red wire from the R terminal on your furnace to the R spot on the adapter, and put the R wire from the adapter there.
Move the blue wire from the Y terminal on your furnace to the Y spot on the adapter, leaving the red and Y adapter wire there.
Move the white wire from the W terminal on your furnace to the W spot on the adapter, leaving the W adapter wire there.
Add the C wire from the adapter to the Com terminal on your furnace, along with the white wire that is already there.
Move the green wire from the G terminal on your furnace to the G spot on the adapter, leaving the G adapter wire there.
Tell the wyze that you are using the adapter during setup, I think it has you put the G wire in the C spot on the thermostat plate.
Happened to me too. I just used the c wire adaptor. Remember to wire the G wire to C on thermostat after the adaptor installation
I tested voltage across R and C at the furnace . It shows 27 on my voltmeter. At the thermostat location the voltage across R and C is only about 20. Not sure why. Gave up & installed the c-wire adaptor.
double check with a multimeter set for volts AC that you have at least 24V between C and Rc
When the Wyze connects W to R in your case, it is just shorting out the transformer… i think wires must have got mixed up somehow…the W terminal on the transformer should be feeding power to the load, which comes back on the common, not shorting out the transformer.
I did this and still got no power to the display on the thermostat. Going to try and call support tomorrow and see what they got for me. Atleast if it’s DOA then they can start the replacement process…hopefully.
Did you take a picture of your setup after you tried it? I’d just like to verify that the wires went to the right places. All 5 wires on the adapter need to be attached to the furnace, and 4 thermostat wires need to be connected to the adapter.
This is an absolute fail on the part of the instructions. I was about to look for an RMA form but luckily came across this thread first. They really need to clarify all things related to the C wire adapter… Thanks to all for posting a much more direct solution!