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Thermostat 2, Smart Thermostat with Dual-Stage Heating & Cooling

YS4004

Product Support

Documentation

FAQ

Is the YoLink Thermostat 2 easy to install?

Yes, the YoLink Thermostat 2 is designed to be user-friendly and easy to install for most users. The installation process typically involves removing your old thermostat, labeling the wires, connecting the wires to the new thermostat, and following the setup instructions provided in the user manual.

Does the YoLink Thermostat 2 require a C wire?

Yes, the YoLink Thermostat does require a C wire (also known as a "common" wire) for proper installation and functionality. The C wire is essential for providing continuous power to the thermostat.

Can a C wire transformer will be compatible with the YoLink Thermostat?

Yes.

Does the YoLink Thermostat 2 support dual-stage heating and cooling systems?

Yes it does. 

Can I use the YoLink Thermostat 2 with my current HVAC system?

The YoLink Thermostat 2 is compatible with most 24V HVAC systems, including gas, electric, and heat pump systems. However, it's essential to verify compatibility with your specific system before installation.

Can I integrate the YoLink Thermostat 2 with my smart home system?

The YoLink Thermostat is designed to work with a variety of smart home systems and platforms, such as Amazon Alexa and Google Assistant. However, to fully integrate the thermostat with these systems, a YoLink Hub is required. The YoLink Hub serves as a central communication point between your smart home devices, enabling seamless integration and control.

Can YoLink Thermostat 2 function as a stand-alone unit without a hub?

Yes, the YoLink Thermostat 2 can work as a stand-alone unit. Without the YoLink Hub, customers can still use it as a regular thermostat to manually control their heating and cooling systems. However, the smart features and remote access through the app will not be available. 


When used as a stand-alone unit, the YoLink Thermostat 2 functions like a traditional thermostat, allowing you to manually adjust temperature settings, set schedules, and control your heating and cooling systems. However, you won't have access to remote control, smart home integration, or other advanced features available through the YoLink app.

How do I set the O/B slide switch on the YoLink Thermostat?

If you set the HP/GAS switch to HP, set the O/B slide switch to O for energizing the reversing valve on cooling (hot climates) or B for energizing the reversing valve on heating (cold climates) operation. If you set the HP/GAS switch to GAS, the valve will only energize for heating.

How can I configure the minimum running time for my YoLink Thermostat 2?

To set the minimum running time, make sure your app and device firmware are updated to the latest versions, then go to the details settings to set the minimum running time from 1 to 60 minutes.

My YoLink Thermostat mounting plate is damaged. What should I do?

In case of a damaged mounting plate, please get in touch with YoLink Customer Support for assistance.

What if I don't have a C wire for my YoLink Thermostat 2?

If you don't have a C wire, you'll need to add a 24 VAC power adapter and apply 24VAC to the R and C terminals.

Is there a battery-powered version of the YoLink Thermostat 2?

No, there is currently no battery-powered version of the YoLink Thermostat.

Can I use Alexa with my YoLink Thermostat for voice control?

 Yes, the YoLink Thermostat is compatible with Alexa. You can use voice commands to switch between modes (Auto, Cool, Heat, Off) and to request information about the device's running mode, Cooling Point, and Heating Point.

 How do I connect the R and RC wires to the YoLink Thermostat 2?

The YoLink Thermostat does not have an RC slot. Connect both R and RC wires to the R slot of the YoLink Thermostat, as they are the same wire in your HVAC system.

What should I do if the YoLink Thermostat 2 does not stay attached to the wall plate during installation?

If you are experiencing issues with the YoLink thermostat not staying attached to the wall plate, ensure that you heard a click sound when you initially pushed the thermostat onto the plate. If you heard the sound but still face issues with the thermostat detaching from the wall when using the physical buttons, please contact YoLink customer support for further assistance.

My YoLink Thermostat 2 is stuck in a power-on loop, the display keeps blinking, and I can't make any selections or factory reset. What should I do?

If your YoLink thermostat is stuck in a power-on loop with a blinking display, try connecting only the R and C terminals to check if the thermostat continues to blink. If the issue persists, contact YoLink customer support for further assistance.

If my current thermostat lacks the common wire (C), how do I go about swapping it with the Yolink Thermostat 2?

To accomplish this, you should acquire and set up a 24VAC transformer. Connect the 24VAC transformer to the C and R terminals on the thermostat.


If I only possess two wires to connect my existing thermostat, how should I proceed to replace it with the Yolink Thermostat 2?

To swap out your 2-wire heater, adhere to these instructions:

Adjust the HP/Gas switch to the Gas position; the O/B switch's position is irrelevant.

Link the 24VAC transformer to the C and R terminals on the thermostat.

Attach one heater wire to the R terminal, and connect the other heater wire to the W terminal on the thermostat.


I experienced a power outage, and when the power came back on, my thermostat didn't activate the heating. How do I restore the thermostat without wifi? 

To resolve this, manually set the thermostat to HOLD mode. Without a network connection, the clock won't sync, which can prevent the system from operating correctly. Switch the Mode to Auto first, then set SCHD to Hold again. If this doesn't resolve the issue, please manually create a schedule on the thermostat.