my ac turns on but the breez plus can't change the fan speed, it just stays on auto

Diagnosis

The inability to change fan speeds on the Cielo Breez Plus typically stems from a "Command Mismatch" between the controller's infrared (IR) library and the specific logic of your AC unit's internal firmware. While the Breez Plus can successfully trigger the "Power On" command—which is a universal signal across most brands—fan speed controls are often model-specific. If the Breez Plus is using a generic code set for your brand (e.g., a generic Daikin or LG profile) instead of the exact model-specific profile, it may send a signal that the AC ignores or interprets as a request to remain in "Auto" mode. Furthermore, this is often caused by "Mode Locking." Many modern inverter AC units are programmed to override manual fan settings when the device is set to 'Dry' mode or 'Eco/Energy Saver' mode. In these states, the AC's internal logic dictates that the fan must remain on Auto to maintain the specific dehumidification or energy-saving parameters. If the Breez Plus is attempting to send a "High Fan" command while the AC is in 'Dry' mode, the AC will simply ignore the command, leaving the fan on Auto. You can confirm this by attempting to change the fan speed using the original physical remote; if the physical remote also fails to change the speed, the issue is the AC mode, not the Cielo device.

How to Fix It

To resolve the fan control issue, you must first eliminate mode restrictions and then synchronize the IR profile. Follow these exact steps:

1. Open the Cielo Home app on your smartphone and select your Breez Plus device from the dashboard.
2. Change the operating mode to 'Cool' or 'Fan'. Ensure it is NOT set to 'Dry', 'Auto', or 'Eco'. Wait 10 seconds for the AC to register the mode change.
3. Navigate to the 'Fan' section of the app interface. Attempt to toggle between 'Low', 'Med', and 'High'. If the AC responds, the issue was Mode Locking.
4. If the fan still stays on Auto, go to the main screen and tap the 'Settings' gear icon in the top right corner.
5. Select 'AC Settings' and then 'Change AC Brand/Model'.
6. Instead of selecting the generic brand, use the search bar to enter your AC's specific model number (found on the sticker on the side of the indoor unit).
7. Select the exact match from the list. The Breez Plus will now download a specific IR map that includes the correct hexadecimal codes for fan speed increments.
8. Restart the Breez Plus by unplugging the USB power cable for 10 seconds and plugging it back in to clear the cache.

If That Didn't Work

• Perform a Manual IR Learning sequence: If your specific model isn't in the database, use the 'Learning Mode' in the app. Point your original AC remote directly at the Breez Plus IR emitter (about 2-3 inches away) and press the fan speed button. The app will capture the exact IR frequency and assign it to the fan control button, bypassing the need for a pre-set library.
• Check for IR Signal Obstruction: Ensure the Breez Plus is not placed behind a curtain or inside a cabinet. Fan speed commands are often "longer" IR strings than power commands; if the signal is weak or reflected, the AC may receive a partial command, which it defaults to 'Auto'. Move the device to a clear line-of-sight within 15 feet of the AC.
• Update Firmware: Check for a firmware update in the app under 'Device Information'. Outdated firmware on the Breez Plus can cause timing issues with IR bursts, leading to commands being ignored by the AC receiver.
• Hard Reset the AC: Power cycle your AC unit at the circuit breaker for 30 seconds. This clears the AC's internal logic board and forces it to accept new IR inputs from the Breez Plus without relying on cached "Auto" settings.

Heads Up

• Avoid placing the Breez Plus directly next to a WiFi router or microwave, as electromagnetic interference can distort the IR signal, causing "ghost" commands or failed fan adjustments.
• Be aware that some 'Inverter' ACs have a "Smart" or "AI" mode that overrides all external controllers; ensure this is disabled on the AC unit itself.
• If you use the 'Auto' temperature setting in the app, the AC will almost always default the fan to 'Auto' regardless of your manual selection. Use a fixed temperature (e.g., 72°F) to maintain manual fan control.
• Periodically clean the IR emitter window on the Breez Plus with a dry microfiber cloth to ensure a strong, clear signal transmission.