949-825-5958 (9am-5pm Western time Mon-Fri) service@YoSmart.com

YoLink Thermostat

  • Question: is the thermostat easy to install? Does it require a C Wire?


Yes, this YoLink Thermostat needs C wire.

We are going to release new version of thermostat for 4 wires installation wich doesn’t require C wire next year.


  • Question: I have a heat pump so hopefully this will work. Below is a picture of my current wiring. I have a blue wire & an orange wire and not sure what to do with them! Also looks like a jumper on the white wire. Please advise!


YoLink thermostat only support regular 5 wires thermostat, it doesn’t support A/C system with heat pump or 2 stages cooling and heating system.

We will develop and release the new generation of thermostat support the heat pump system in next year.


  • Question: If my central air does not have a 24volt wire, can i still use your thermostat?


If you do not have 24V AC, you can use the 24 Volt Transformer C Wire Adapter to power the thermostat. You can find the adapter at the following link.


  • Question: My thermostat only have 4 wires; how do I connect this transformer?


You can try to upgrading from a 4 Wire Thermostat to a 5 Wire Thermostat, the following videos might be helpful.


  • Question: How to install Thermostat?


We haven’t taken a video for the YoLink Thermostat yet, below is the diagram from one of our customers.

We have a YouTube video for our first-generation Thermostat which involves the same installation. https://www.youtube.com/watch?v=RvneubBlk7k

Please kindly read the following user guide before installation. http://www.yosmart.com/support/YS4002-UC/docs/instruction 

Any question, please kindly contact us.