The BreatheSmart 75i Particle Sensor Colors & Meaning:

• Blue - Very low level of airborne particles detected
• Green - Low level of airborne particles detected
   
• Orange - Medium level of airborne particles detected
• Red - Significant level of airborne particles detected
• Purple - Very significant level of airborne particles detected

VOC levels do not change the color ring or the fan speed, only PM2.5 readings will change the color or fan speed. 

If the particle sensor is not changing colors or stuck on one color, ask the customer the following:

• Do you vacuum the prefilter?
• Has anything changed in the room recently?
• Where is the purifier located?
  -Is it in or near a kitchen?
  -Were you recently cooking?
• Do you have any windows or doors open?
• Did you recently paint the room the purifier is in or have new carpet installed in the room the purifier is in?
• Do you have a candle burning or use an oil diffusor?
• Do you have a Humidifier running in the same room as the Purifier?
• Heat and AC running can affect the air quality
• Does the customer have pets?

If the particle sensor is stuck on blue or green, have the customer either light a match and blow it out, or spray an aerosol air freshener, wait up to 60 seconds. If the sensor light doesn't change, follow the next steps these troubleshooting steps:

1. Unplug the purifier from the wall outlet.
2. Remove the power cord from the back of the purifier.
3. Remove the panel and the filter from the purifier.
4. Let the purifier rest for 30 seconds without the filter or panel installed.
5. Reinstall the filter, making sure that it is placed securely back in the unit (insert bottom of the filter first, and then press the top in until it clicks. Then proceed to press on all four corners to ensure that it is completely locked in place.)
6. Place the panel back on the unit, making sure it closes securely. 
7. Reinstall the power cord into the back of the purifier, ensuring it is tightly locked in place. 
8. Plug the purifier back into the wall.
9. Press the power button to power on the purifier. 

 If the particle sensor is stuck on Orange, Red, or Purple, we recommend placing the purifier in a small room or closet that doesn't get a lot of traffic for 48 hours. In that time, ask the customer to periodically check to see if the particle indicator light changes. If it doesn't change, please follow the troubleshooting steps:

1. Unplug the purifier from the wall outlet.
2. Remove the power cord from the back of the purifier.
3. Remove the panel and the filter from the purifier.
4. Let the purifier rest for 30 seconds without the filter or panel installed.
5. Reinstall the filter, making sure that it is placed securely back in the unit (insert bottom of the filter first, and then press the top in until it clicks. Then proceed to press on all four corners to ensure that it is completely locked in place.)
6. Place the panel back on the unit, making sure it closes securely. 
7. Reinstall the power cord into the back of the purifier, ensuring it is tightly locked in place. 
8. Plug the purifier back into the wall.
9. Press the power button to power on the purifier. 

If troubleshooting does not resolve the customer's issue, please move forward with the warranty replacement process.