How to tell if your cooling system has a dehumidification mode

Cool to Dry can use your central air conditioner or heat pump to help lower the humidity in your home. Some cooling systems are also manufactured with a dehumidification mode to help reduce excess moisture.

Follow these steps to view your system’s wiring, and then check the Google Nest thermostat’s  Star connector icon  star connector to find out if your cooling system has a dehumidification mode.

How to check your thermostat's wiring for dehumidification mode

Follow these steps to view your system’s wiring, and then check the Nest thermostat’s terminal to find out if your cooling system has a dehumidification mode.

Note: Only 2nd and 3rd generation Nest Learning Thermostats are compatible with systems that have a standalone dehumidifier or an air conditioner with a dehumidification mode.

On your Nest thermostat:

1. Press your thermostat’s ring to open the Quick View menu.
2. Choose Settings and then Equipment.

With the Nest app:

1. Select the thermostat you’d like to check on the app home screen.
2. Tap Settings Nest settings icon.
3. Choose Equipment and then Wiring

If there isn't a wire in the Star connector icon  star connector

Your air conditioner doesn't have a dehumidification
mode.

How Learn how Cool to Dry works 

Nest thermostat equipment detected no star

If there is a wire in the Star connector icon  star connector, 
check the wire label.

  • If the Star connector icon  wire doesn't say dehum next to it
    Y
    our system does not have a dehumidification
    mode.

  • If the Star connector icon  wire says dehum next to it 
    Your system has a dehumidification mode or a
    standalone dehumidifier


    If you have a standalone dehumidifier,
     Cool to
    Dry will not be an option in the Nest 
    Sense menu.
    Your Nest thermostat will use your dehumidifier
    instead of Cool to Dry to help control the humidity
    in your home.

Learn how Cool to Dry works

 

Nest thermostat equipment detected dehumidifier

Check your system's manual or ask a Nest pro

If you still need help determining if your air conditioner or heat pump has a dehumidification mode, look up your model number on the manufacturer’s website, or check the manual. A Nest Pro installer will also be able to determine if your system has a dehumidification mode.

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