Cync Smart Thermostat FAQs
Frequently asked questions for the Smart Thermostat.
Use these links to jump sections.
Hardware and Installation
Network Information and Troubleshooting
Cync App
Voice Assistants
Hardware and Installation
Can I install the thermostat myself?
Yes, the Cync Smart Thermostat is able to be installed without an HVAC professional.
Can I connect a humidifier, dehumidifier or vent to my thermostat?
Humidifiers, dehumidifiers and vents are not supported.
What type of HVAC systems are compatible?
Please see the Cync Smart Thermostat HVAC Compatibility article.
What do my thermostat's wire labels mean?
| Label | Description |
|---|---|
| C | Is the Common wire from your HVAC system that supplies 24VAC to power the thermostat. The wire is typically blue or black. If a Common wire is not present, you will need to install your Cync Smart Thermostat with the included Power Extender Kit (PEK). |
| R | Heating and cooling power wire. It is typically red. If there is only one R wire, (including Rc and Rh) this will be inserted into the Rc terminal on the Cync Smart Thermostat. NOTE: No need for a jumper wire between RC and RH. The thermostat will handle it for you. |
| Rh | In a single transformer HVAC system Rh is the heating and cooling power wire. To supply power to the Cync Thermostat it must be wired to Rc. In a dual transformer HVAC system where there are Rh and Rc power wires, Rh is the power wire connected to the heating transformer. |
| Rc | In a single transformer HVAC system Rc is the heating and cooling power wire. In a dual transformer HVAC system where there are Rh and Rc power wires, Rc is the power wire connected to the heating transformer. |
| W1 | With a conventional HVAC system W1 controls the first stage of heating. With a Heat Pump system W1 controls stage 1 Auxiliary heat. |
| W2 | With a conventional HVAC system W2 controls the second stage of heating. With a Heat Pump system W2 controls stage 2 Auxiliary heat. |
| Y1 | With a conventional HVAC system Y1 controls the first stage of cooling. With a Heat Pump System Y1 controls the first stage of heating and cooling. |
| Y2 | With a conventional HVAC system Y2 controls the second stage of cooling. With a Heat Pump System Y2 controls the second stage of heating and cooling. |
| G or G1 | Controls your HVAC fan. Wire is green. |
| O/B | In a heat pump HVAC system, O/B is used to control the reversing valve which switches your system from heating to cooling and vice versa. |
| E | The E wire is for Heat Pump systems and is used to turn the Emergency Heat On/Off. The E wire connects to the W1 terminal of the Cync Thermostat. |
| AUX/AUX1 and AUX2 | Some Heat Pump systems will have two stages of Emergency Heating. Connect the Aux/Aux1 wire to the W1 terminal and the Aux2 wire to the W2 terminal on the Cync Thermostat. |
How many sensors can I use with the thermostat?
Up to six wireless sensors can be configured with Cync Smart Thermostat.
How far away can the sensors be from the thermostat?
Communication to the sensor can be affected by walls, objects, and other forms of interference. It is recommended to place the sensor within 25-30ft of the thermostat, but can support up to 40ft in open air.
Can I use the thermostat outside?
No, the Cync Thermostat is unable to endure outdoor environments.
There is an extra wire in the wall after removing the old thermostat, what is it?
Sometimes not all wires from the HVAC system are used on certain brands of thermostats. If your previous thermostat did not have Common wire attached, one of the extra wires may be used as the Common wire for the Cync Thermostat. Ensure the selected wire is also connected to the C terminal at the furnace control board.
Do I need a c-wire for installation?
The C wire is required to power the Cync thermostat. If a C wire is not available, you will need to use the Power Extender Kit (PEK) to add a C wire to your system.
Do I need a Power Extender Kit for installation?
The PEK only supports single transformer hvac systems. If your system has both an Rc and Rh wire it. See wiring diagram below:
Why won't my thermostat power on?
- Confirm that all wires are properly inserted into the terminal blocks at the thermostat. Tug at the wires to ensure they are firmly in place.
- Make sure the R (power) wire is connected to the RC terminal.
- Ensure the circuit breaker is powered back on.
- Some HVAC equipment feature a safety or locking system that cuts power off if the cover panel isn’t shut properly. Ensure that it is.
- If the Power Extender Kit (PEK) was used, ensure the R wire is connected to RC only. Confirm that the G wire is inserted properly into the terminal.
How do I reset my thermostat?
From the Smart Thermostat: Hold down the menu icon for 10 seconds. This will factory reset your thermostat.
From the Cync app: Select your thermostat and select the Gear Icon > Delete Device. This will factory reset your thermostat and will remove the thermostat from your Cync account.
How do I control my fan using the Cync Smart Thermostat?
The Fan button on the Thermostat face can be used to set the Fan to Auto or On. Auto will only run the run the fan during heating or cooling cycles. On will run the fan continuously.
Within the Climate Service of the Cync App, select the Controls button.
The Fan can be set to Auto or On. Additionally the fan be set to circulate by dragging the slider under the Circulation setting to either 15, 30, 45, or 60 minutes per hour. Circulation will run the fan for the time configured each hour to provide fresh air throughout the home.
Network Information and Troubleshooting
Does the thermostat work with 2.4 GHz and 5 GHz bands?
Only 2.4 GHz is supported.
Will I lose thermostat settings if there is an outage?
No settings will be lost. Upon reboot, the last know configuration is applied.
Can I control my thermostat away from home?
Yes, as long as your device has internet connection.
Will my Cync Smart Thermostat work without Wi-Fi?
The Cync Smart Thermostat still has functionality without Wi-Fi connection. It will be able to engage with your HVAC equipment and function as a traditional thermostat. However, it will lose some functinoality such as scenes and control via the Cync App.
How do I build a schedule on the thermostat?
Please see the Cync Thermostat Settings article.
What do the icons mean on the main screen on the thermostat?
Please see the Cync Thermostat Settings article.
Why can't my device be located?
- Make sure that your smart phone has Bluetooth enabled.
- Verify the blue tooth icon is shown in the top right corner of the thermostat. If not, remove the t-stat face plate and then put it back on. This will restore commissioning mode.
Why can't I connect my thermostat to my home's Wi-Fi?
- Ensure that your router is on and working properly. The Cync Smart Thermostat is only compatiable with 2.4 GHz networks. For dual-band routers, connect to the 2.4 GHz band and not 5 GHz.
- Update the firmware. From the home screen on the Cync App, go to Settings > Firmware Updates.
- Check the strength of your Wi-Fi. From the home screen select your Cync Smart Thermostat and select the gear icon.
- Try trouble shooting connections with the router:
- Power cycle the Cync Smart thermostat and your router. Unplug the router and remove the thermostat cover from the wall. Wait 3 minutes and replace the cover and plug the router back in.
- Try to reconnect to the Wi-Fi once the router and thermostat are back up and running.
- Check to see if there is a weak Wi-Fi signal strength. Try moving the router closer to the thermostat or consider a Wi-Fi range extender to provide a stronger signal.
Cync App
How do I control my Smart Thermostat with the Cync app?
- Depending on how many devices or rooms you've setup, you will have different home screen views. The tile for multiple device, the room view for single device type, or the multiple room view for single device type.
- Control setpoints, adjust temperature, and set schedules all from your Cync app.
- Schedules: To access a schedule for the Smart Thermostat, navigate to the device screen and select the calendar icon from the bottom of the screen. From that screen you may add a new schedule, or edit an existing one.
- Individual schedules can be enacted weekly or daily for in depth temperature control for each HVAC mode (Auto/Heating/Cooling).
- Weekly and Daily schedules allow you to control the ideal temperature range for specific hours of the day. A larger setpoint range for when you are not home will keep the HVAC system from turning on as often.
How do I use a sensor in the Cync app?
You can setup a separate schedule just for the sensors that will enable the HVAC system to utilize the temperature readings from specific (or many) sensors instead of the Thermostat's internal sensor. To create and edit sensor schedules navigate to the thermostat device screen that has the desired sensor you wish to create or edit a schedule for. Click the gear icon at the top right, then select Edit this Thermostat. Scroll down on the device settings screen and select Sensor Schedules. From this screen you will be able to create a list of setpoints for determining which sensor(s) to be used.
How do I find information of my Cync Smart Thermostat?
From the Home Page in the Cync App, select your Cync Smart Thermostat then select the gear icon on the top right of the page.
Voice Assistants
What Voice Assistants are compatible with my Cync Smart Thermostat?
Google Home and Alexa.
What voice commands can I use with my Alexa?
First, you need to Enable Alexa Control
- Once you've enabled Alexa Control, make sure the names you give your Cync devices and rooms in the Alexa app matches the names in the Cync app.
- You can control your thermostat in various ways through the Alexa app, or with voice commands to an Alexa voice assistant.
Set the Temperature
- "Alexa, set the thermostat to <temperature>"
- "Alexa, set <thermostat name> to <temperature>"
Increase or Decrease the Temperature
- "Alexa, raise/lower the thermostat temperature by <number> degrees"
- "Alexa, raise/lower the <thermostat name> temperature by <number> degrees"
- "Alexa, increase/decrease the thermostat temperature"
- "Alexa, increase/decrease the <thermostat name> temperature"
Get the Temperature
- "Alexa, what's the thermostat temperature?"
- "Alexa, what's the <thermostat or sensor name> temperature?"
- "Alexa, what is the thermostat set to?"
- "Alexa, what is the <thermostat name> set to?"
What voice commands can I use with Google Home?
First, you need to Enable Google Control.
- Once you've enabled Google Control, make sure the names you give your Cync devices and rooms in the Google Home app matches the names in the Cync app.
- You can control your thermostat in various ways through the Google Home app, or with voice commands to the Google voice assistant.
General Thermostat Commands
- Ok Google, what is the current temperature in the <thermostat name>?
- Hey Google, what's the <thermostat name> set to?
- Ok Google, what's the temperature of my thermostat?
Set the Temperature
- Ok Google, set the temperature in the <thermostat name> to <temperature>
- Ok Google, set the temperature to <temperature>
Increase or Decrease the Temperature
- Hey Google, increase the temperature in the <thermostat name>
- Hey Google, decrease the temperature in the <thermostat name>
- Hey Google, increase the temperature in the <thermostat name> by <number> degrees
- Hey Google, decrease the temperature in the <thermostat name> by <number> degrees
Adjusting Modes
- Ok Google, set the <thermostat name> to heat
- Ok Google, set the <thermostat name> to cool
- Ok Google, set the <thermostat name> to auto
- Ok Google, set the <thermostat name> to off
Scheduling
- Hey Google, turn off the <thermostat name> hold
- Ok Google, turn on the <thermostat name> schedule