C-Wire Adapter CWIREADPTR8001/E​

Easy to install. Most install guides I found for it online show a 4 wire thermostat but I had a 5 wire thermostat (R W Y G W2 wires). In this case, the W2 wire stayed connected to the control board of the HVAC and I did what the instructions said with the other 4. Amazon Smart thermostat booted right up after installation.

Was previously using the workaround of giving up fan control to gain a c wire to power my thermostat with the old four wire cable. I wanted to regain fan control. Have to follow the instructions carefully but this device lets me power a thermostat and regain fan control using the original four wire cable.

Good product!

Used to wire Alexa thermostat to my older thermostat. Very happy with it

I returned this like a lot of others. Lesson learned: check both ends of your wiring before ordering this. My wiring was all 4-wire at the furnace so ordered the converter. Pulled the old thermostat before installation and it was 5-wire...hmmm. A contractor had cheaped-out and spliced 4-wire to 5-wire in the run. I took the better and cheaper route of buying a length of 5-wire cable and completing the circuit. Good thing too since this converter is not guaranteed to work on zoning systems (which I have).The Honeywell smart thermostat comes with a simple jumper wire that basically does the same thing as this unit on the furnace side. For those who can follow instructions and understand a wiring diagram the jumper will suffice. For others that want a simpler color-by-numbers setup should get this device. My advice: save some money and just use the jumper.Giving a low rating since although built well, this product is overpriced for what it does and likely unnecessary.

I've installed these in 3 locations with great success. The Honeywell version was selected over the competitors as these were to assist in the install of a Honeywell thermostat and I wanted no lingering problems to resolve.The concept is quite simple, all this does is control both the fan and compressor from the Y wire and frees up G to use as a 28V return. With more time available, it would be a fun electronic project but these are installed and I'm finished!The main question is why are HVAC installers so cheap as to not have a full compliment of thermostat control wires? What, another $0.05 per foot?

Easy to install if you have your smart friend do it

I used this to wire in my fiancées trailer furnace. It took a little doing since her ac and furnace aren’t your normal home units, but ultimately I bent my brain around the wiring colors and it worked. Just took a little doing is all.