Does Nest Work with Gree? A Comprehensive Guide

The compatibility of Nest thermostats with Gree heat pumps is a topic of interest for many homeowners. While Nest thermostats are designed to work with most 24V systems, including those with separate heating and cooling systems, there are certain limitations when it comes to Gree heat pumps. In this comprehensive guide, we’ll explore the intricacies of making Nest thermostats work with Gree heat pumps, providing you with a detailed, hands-on approach to ensure a seamless integration.

Nest Thermostat Compatibility with Gree Heat Pumps

One of the primary limitations when it comes to using Nest thermostats with Gree heat pumps is the number of cooling stages. Nest thermostats are only compatible with systems that have one or two stages of cooling. The Nest Thermostat E, for instance, is only compatible with one stage of heating, one stage of cooling, and an additional stage of either heating or cooling. This means that if your Gree heat pump has more than two stages of cooling, it may not be compatible with Nest thermostats.

Another limitation is the connection to L wires, which are typically used to show system status, such as emergency heat being on. While Nest thermostats cannot directly connect to L wires, they don’t require them. The Nest thermostat and Nest app will still provide you with system status information without the need for L wire connections.

Overcoming Compatibility Challenges

does nest work with GreeImage source: Gree ac by Air Fans

Despite these limitations, there are ways to make Nest thermostats work with Gree heat pumps. One user on Reddit was able to get their Gree Flexx heat pump to work with an Ecobee thermostat by setting it up to run their air handler at high or low speed based on the temperature difference. This allowed them to treat the system as a two-stage system, with the compressor modulating itself based on the returned refrigerant temperature and pressure.

Another user was able to convert their Gree thermostat to a Nest thermostat by using the online Compatibility Checker to determine if their system was compatible. However, they noted that the wiring on the Gree thermostat was not labeled, which made the conversion more difficult.

Step-by-Step Guide: Integrating Nest Thermostat with Gree Heat Pump

To help you navigate the process of integrating a Nest thermostat with a Gree heat pump, we’ve compiled a detailed, step-by-step guide:

Step 1: Determine System Compatibility

  1. Use the Nest Compatibility Checker to verify if your Gree heat pump is compatible with the Nest thermostat.
  2. Identify the number of cooling stages in your Gree heat pump. If it has more than two stages, you may need to explore alternative options.
  3. Assess the wiring of your Gree thermostat. Ensure that the wiring is properly labeled, as this will simplify the conversion process.

Step 2: Prepare the Wiring

  1. Disconnect the power supply to your HVAC system before proceeding with any wiring changes.
  2. Carefully label the existing wires connected to your Gree thermostat to ensure proper reconnection.
  3. Refer to the Nest thermostat installation guide and the specific wiring requirements for your Gree heat pump model.
  4. Connect the wires to the Nest thermostat according to the manufacturer’s instructions, ensuring a secure and proper connection.

Step 3: Configure the Nest Thermostat

  1. Follow the on-screen instructions to set up your Nest thermostat.
  2. Ensure that the Nest thermostat is properly configured to work with your Gree heat pump, including setting the correct number of heating and cooling stages.
  3. Test the functionality of your Gree heat pump and Nest thermostat integration by running various heating and cooling cycles.

Step 4: Optimize System Performance

  1. Monitor the performance of your Gree heat pump and Nest thermostat integration over time.
  2. Adjust the Nest thermostat settings, if necessary, to optimize energy efficiency and comfort.
  3. Consider any additional modifications or workarounds, such as running the air handler at high or low speed, to ensure seamless operation.

By following this step-by-step guide, you can successfully integrate your Nest thermostat with your Gree heat pump, overcoming compatibility challenges and ensuring optimal system performance.


While the compatibility of Nest thermostats with Gree heat pumps may present some challenges, there are ways to make the two systems work together. By understanding the limitations, using the Nest Compatibility Checker, and following a detailed, hands-on approach, you can successfully integrate your Nest thermostat with your Gree heat pump. Remember to always prioritize safety and consult with a professional if you’re unsure about any aspect of the installation or configuration process.