I currently have the simplest of thermostats - only two (2) wires. One red connected to RH and one white connected to W1. Plus a black jumper between RH and RC.
The WYZE compatibility checker won’t let me proceed if I only enter the letters for the two wires I have (it says don’t enter jumpers). It wants one more wire … but I don’t have a 3rd wire.
Anyone know if the WYZE thermostat will work anyway? Seems incredible that it couldn’t handle just two wires …
a minimum of 3 wires is required. Since u only have heat, the only other option is to use a separate 24v transformer that plugs into an outlet.
I was having similar problems. I have an older home with a multi zone radiant heat. I bought a Wyze thermostat as a test to replace an existing battery powered thermostat. Upon initial install I found my thermostat wire only had two wires and would not power up my thermostat. My multi zone controller (Erie VL500) had 24 VAC available to power the thermostat, but I was still one wire short to give the thermostat the common it needed. Only having two wires I felt I had five choices:
FYI - I chose solution 4. I used the Fast-Stat Common Maker product and it worked awesome! I have just purchased 3 more Wyze thermostats and Fast-Stat Common Makers for my remaining zones.
I really hope this post helps others!
HAPPY HEATING (or COOLING)!!!
Larbo
I have only a RH and W wire, and just bought a 24V AC Transformer that I use to power thermostat - see below on instructions:
I had two wire thermostat as well. I tried to use the Wyze supplied C-wire adapter but it didn’t work and was doing all sorts of funky things to my furnace. The 24V doorbell transformer did the trick!! Simple enough for me. Rh and W to thermostat, Rc and C to 24V transformer. Done.
