Why Is My Costway Mini Split Air Conditioner WiFi Not Connecting

Properly connecting your Costway mini split air conditioner to Wi-Fi and integrating it into your smart home system can significantly enhance your quality of life. However, the initial setup process can be frustrating due to differences between app versions across various series and strict network requirements. 

This article is the most up-to-date and comprehensive guide for 2026, compiled based on official technical documentation and the real-world troubleshooting experiences of countless users. Whether you’ve just unboxed your unit and are preparing for your first connection, or you’ve hit a dead end with errors like “Device Offline” or “Unable to Pair,” this blog post will help you resolve the issue completely.

Key Takeaways 

• A 2.4GHz network is non-negotiable: All Costway AC WiFi modules only recognize 2.4GHz bands. If your router is dual-band (sharing one WiFi name for both 2.4G and 5G), you must log into your router settings to separate them or temporarily disable the 5G network during setup.

• Download the right app: There is no single official Costway app! Different series use completely different IoT ecosystems. Check the table below to download the app that matches your model. Using the wrong app means you'll never find the device.

• Enable all necessary permissions: During initial installation and setup, the app will ask for Location, Storage, and Camera permissions. Make sure to "Allow" all of them, or the app won't be able to scan the AC's hotspot.

Which App Should You Use? (Quick Reference Table)

Don't blindly search the app store. Check your AC series and download the corresponding official app:

Connecting Your Mini Split Air Conditioner to WiFi 

If you've already tried connecting your WiFi-enabled mini split and failed, or the app says "Offline," follow these 3 steps for a quick fix (takes less than 3 minutes): 

Step 1: Check your WiFi network (30 seconds) 

Go to your phone's WiFi settings, forget your current WiFi network, and reconnect. Before entering the password, stop and confirm: the network must be 2.4GHz, and your phone hasn't automatically switched back to a 5GHz network.

Step 2: Physically reset the AC WiFi module (1 minute) 

Deleting the device in the app does not reset it! The physical WiFi module must be reset to enter pairing mode again:

• SEERXtreme Series: While the AC is turned on, press the "HEALTH" button 8 times, OR press and hold the "COOL" and "+" buttons together for 3 seconds.

• Lithzen Series: While the AC is plugged in but turned off (standby), press the "DISPLAY" button 8 times.

Step 3: Re-add the device to the correct app (1 minute) 

Open the correct app for your model (AC Freedom, Smart Life, or Tuya Smart). Make sure your phone's Bluetooth is on, tap "Add Device", enter your 2.4GHz WiFi password, and wait for the progress bar to hit 100%.

How to Correctly Connect Different Series of Costway Air Conditioners to Wi-Fi? （Step-by-Step）

Connecting your Costway air conditioner to Wi-Fi is not a one-size-fits-all process. Given that Costway offers several distinct product series, the required smartphone app and physical reset method vary significantly depending on the specific model you own. Detailed, step-by-step connection guides tailored to your specific series are provided below to ensure a smooth and successful setup.

SEERXtreme Series Mini Split Air Conditioners (Required App: AC Freedom)

If your AC is from the SEERXtreme Series (e.g., Airtural, GreyVolt, or Ultreco Series), it uses specific remote control technology. You must use the AC Freedom app.  

Prerequisites

• Network Requirement: Your phone must be connected to a 2.4GHz WiFi network. 5GHz is not supported.

• Phone OS: Android 4.1 or iOS 6.0 and above.

• Placement: Keep your phone and router as close to the AC unit as possible during initial pairing.

Hardware Prep & WiFi Reset

Before opening the app, you must put the AC into pairing mode.

• Method 1 (Remote with a "HEALTH" button): Make sure the AC is running. Press the "HEALTH" button 8 times. You will hear two beeps, meaning the reset is successful.

• Method 2 (Remote without a "HEALTH" button): Make sure the AC is running. Press and hold the "COOL" and "+" buttons together for 3 seconds. You will hear 8 continuous beeps, a 2-second pause, and then two final beeps. Reset successful.

WiFi Connection Steps

Step 1: Download and Activate App

1. Search for and download "AC Freedom" in your app store.

2. Open the app to the Welcome/Scan Activation screen.

3. Activation Code: Enter the official activation code 6364d and click "Activate". (If your app version is outdated, upgrade to 2.0+ first.）

Step 2: Add AC in App

1. Make sure Bluetooth and WiFi are on. Tap the blue "Add device" button in the middle of the home screen.

2. Select "air conditioner".

Step 3: Configure WiFi

1. The app will auto-fill your current WiFi SSID.

2. Carefully enter your WiFi password (check for typos). Tap "Connect to Wi-Fi".

3. The app will prompt you to reset the WiFi (which you already did). Tap "Get started" at the bottom.

Step 4: Wait for Pairing

1. A loading circle (0% - 100%) will appear on your screen.

2. Once finished, a "Set up successfully" prompt will pop up. Tap "Join the room".

3. All done! You can now tap the AC icon on the home page to access the control panel.

Click Here to Download: Costway SEERXtreme Series Official WiFi Connection Manual (PDF) 

Costway SEERXtreme Series Official WiFi Connection Manual.pdf

Blast Pro Series Mini Split Air Conditioners (Required App: Smart Life)

If you own a Blast Pro Series mini split ac (e.g., EcoGuard, EchoCool, X-Pro), use the Smart Life app.

Prerequisites

• Pure 2.4GHz Network: Your phone must be connected to a 2.4GHz network.

• Permissions: Allow Storage, Location, and Camera permissions when opening the app for the first time. Without Location access, the app won't auto-scan for the AC.

Hardware Prep

Unlike other series, the Blast Pro reset command isn't fixed; it follows the app's on-screen animation or relies on a physical USB module:

1. Plug the AC in (you'll hear a beep, but do not turn it on with the remote).

2. If your model has an independent USB WiFi module, ensure it is firmly plugged into the dedicated port under the AC panel.

3. For the exact reset operation (e.g., holding a button), follow the on-screen animation in the app in the next step.

WiFi Connection Steps (CF Mode)

We highly recommend the default CF Mode (Quick Connection):

Step 1: Download and Register

• Download: Search for and download "SmartLife-SmartHome" from the app store and open it.

• Activate the App: Upon launching the app for the first time, it requires activation. You can either tap "Scan" to scan the activation QR code from your physical manual, OR tap "or Enter Activation Code" at the bottom of the screen, input the activation code Costway, and tap "CONFIRM".

• Register: Register an account with your email, get the verification code, and set a password.

• Set up: Click "Create family" and grant location permissions to help with smart home automation later.

Step 2: Add AC in App

1. Tap the "+" icon (Add Device) in the top right corner.

2. Go to "Large Home Appliances" on the left menu, then tap "Split Air Conditioner" on the right.

3. Enter your 2.4GHz WiFi password and tap "Next".

Step 3: Pairing Mode & "Secret Codes"

1. Ensure the top right corner shows "CF Mode".

2. Follow the app's prompt to reset the AC WiFi.

3. Tap "Next". The phone will start connecting, showing a percentage bar.

4. Geek Troubleshooting Tip: Look at the AC's LED display! It will flash three codes showing your connection progress:

• PP: Searching for the router.

• SA: Connected to the router.

• AP: Connected to the server. (If it gets stuck on a letter, you'll know exactly if the password is wrong or if the internet is down!)

Backup Plan: AP Mode (If CF Mode Fails)

If the progress bar hits 100% and fails, use AP Mode:

1. Repeat the steps, but switch the top right corner to "AP Mode".

2. Reset the device as prompted, then tap "Go to Connect".

3. Go to your phone's WiFi settings. Find and connect to the hotspot named SmartLife-XXXX.

4. Switch back to the Smart Life app immediately and wait for the progress bar to finish.

Click Here to Download: Costway Blast Pro Series Smart Life Official WiFi Connection Manual (PDF) 

Lithzen Series Mini Split Air Conditioners (Required App: Tuya Smart)

The Lithzen Series connects to the Tuya ecosystem. You must download the Tuya Smart app. While it looks similar to Smart Life, use Tuya Smart to guarantee compatibility.

Prerequisites

• Pure 2.4GHz Network: Make sure your router provides a standard 2.4GHz connection. If it's a dual-band router, give your 2.4G and 5G networks different names (SSIDs).

• Turn off Cellular Data: Turn off your mobile data temporarily before setup, so your phone doesn't automatically switch to cellular networks during pairing.

• Distance: Keep your phone and router close to the AC during setup.

Hardware Prep & WiFi Reset

Note: The Lithzen series reset logic is the exact opposite of the Blast Pro series!

1. Ensure the AC is plugged in but turned OFF (standby)!

2. Press the "DISPLAY" button on the remote 8 times quickly.

3. Watch the WiFi light on the AC unit:

• Fast blink (twice per second): Quick Connection mode (Recommended).

• Slow blink (once per second): AP Mode.

• (Press DISPLAY 8 times again to switch between these modes).

WiFi Connection Steps

Step 1: Download Tuya Smart

1. Download "TUYA SMART", register, and log in.

2. Tap "+" or "Add Device" in the top right.

3. Select "Large Home Appliances" -> "Air Conditioner (Wi-Fi)".

Step 2: Quick Connection

1. Confirm the AC WiFi light is fast blinking.

2. Check "Confirm indicator rapidly blink" in the app and proceed.

3. Select your 2.4GHz WiFi and enter the password.

4. Wait for the progress bar to finish.

(Backup AP Mode: Switch to slow blink, select AP Mode in the app, connect to the temporary hotspot broadcasted by the AC, and switch back to the app.)

Common Issues with Costway Air Conditioner Wi-Fi Connectivity and How to Fix 

Don't panic! If you followed the steps and it still failed, it's usually a minor settings issue. Find your symptom below to self-diagnose.

Issue 1: "Whoops / Failed to Add" (Progress Bar Fails)

• Symptoms: The progress bar gets stuck, or hits 100% and says "Failed to Add" or "Whoops".

• Root Cause: Your phone found the AC, but the AC couldn't connect to your router. This is almost always a network band or firewall issue.

• Fixes:

1. Check 2.4GHz again: Is your router dual-band? The AC might be getting forced onto the 5GHz band. Fix: Log into your router, turn off 5GHz temporarily, or rename the 2.4G and 5G networks so they don't share the same SSID.

2. Wrong Password: Forget the network and type the password again. Ensure there are no trailing spaces or special characters (keep it under 32 characters).

3. Router Security: Check if your router has MAC address filtering or a strict firewall enabled. Turn them off temporarily.

4. The Ultimate Fix: Reboot your router and your phone, then try again.

Issue 2: WiFi Light Doesn't Blink / No Reset Beeps

• Symptoms: You're pressing the remote buttons, but the AC isn't responding.

• Causes & Fixes:

Issue 3: Device "Offline", Cannot Remote Control

• Symptoms: It connected fine before, but now the device is grayed out in the app.

• Fixes:

1. Power outage protection: If your home just lost power, the app needs about 3 minutes to regain control after power is restored. Be patient.

2. Refresh Cache: Go to the app's home screen, press and hold the screen, and swipe down to refresh the device list.

3. Network Change: If you got a new router or changed your WiFi password, you must remove the device in the app and repeat the entire physical reset and pairing process from scratch.

Conclusion

Connecting your Costway AC to WiFi isn't complicated if you follow the core logic: stick to 2.4GHz, download the right app, and use the correct physical reset method. Most errors can be self-diagnosed using the Decision Tree above. Once connected, you can turn on your AC before you get home, set smart schedules, and even use voice control via Amazon Alexa or Google Home. Taking a few minutes to set this up properly is absolutely worth it!

If you've tried all steps and suspect a hardware defect, please contact Costway's official customer support for further assistance: [email protected] 

FAQs

Why doesn't my Costway AC support 5GHz WiFi?

This isn't outdated technology; 2.4GHz penetrates walls much better and has a longer range. Smart home appliances (like air conditioners) are fixed in place and need extreme connection stability rather than ultra-fast download speeds. That's why 2.4GHz is the global standard for IoT chips.

Can I control my Costway AC when I'm away from home or at the office?

Absolutely. As long as your AC is online and connected to your home WiFi, you can use your phone on a 4G/5G mobile network or office WiFi to send commands to the AC via the cloud.

What happens if I change my WiFi network (new router or password)?

For security reasons, the AC cannot automatically migrate to a new network. You must delete (or unbind) the device in your app, physically reset the AC's WiFi module, and run through the "Add Device" process again with your new WiFi password.

Why does my Costway AC connect fine in the living room, but drops offline in the bedroom?

This is usually due to physical distance or walls causing extreme WiFi signal degradation. The WiFi antennas inside smart appliances aren't as powerful as those in modern smartphones. If your phone only gets 1-2 bars of WiFi in that bedroom, the AC will likely disconnect often. We recommend adding a WiFi repeater or upgrading to a Mesh router system.