# PA Zen AQI LED’s Randomly Changing Colour

**URL:** <https://community.purpleair.com/t/pa-zen-aqi-led-s-randomly-changing-colour/10342>\
**Category:** Troubleshooting\
**Created:** [September 25, 2024, 12:23pm UTC](https://community.purpleair.com/t/pa-zen-aqi-led-s-randomly-changing-colour/10342 "2024-09-25T12:23:30Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![AirFright](https://avatars.discourse-cdn.com/v4/letter/a/f08c70/32.png) [@AirFright](https://community.purpleair.com/u/AirFright)\
**Post date:** [September 25, 2024, 12:23pm UTC](https://community.purpleair.com/t/pa-zen-aqi-led-s-randomly-changing-colour/10342/1 "2024-09-25T12:23:30Z")

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Hi  
Does anyone know why my PurpleAir Zen’s LED lights keep randomly flashing different colours. For example, one minute it will be dark green, 2 seconds later it will be red, then yellow and back to dark green a few seconds later. I have noticed that it does not affect the 2 minute average of PM2.5 nor show up on the map graph or API with the real-time averaging period selected. It has only started doing this in the last 3 days that I am aware of.  
My outdoor monitor does not detect any high readings when my Zen changes colour.  
I have checked the ADC Voltage and there is no evident drops in voltage at the times that the LED colour changes. It usually sits at around 4.10V - 4.25V. The adapter I am using is rated at 5V, 2A.

Is there anything I can do to fix this problem, or is my sensor faulty?  
My Zen has only been operating since the start of June 2024.

Thank You 🙂

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**Author:** ![Kieran](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/kieran/32/6220_2.png) [@Kieran](https://community.purpleair.com/u/Kieran)\
**Post date:** [September 26, 2024, 6:12pm UTC](https://community.purpleair.com/t/pa-zen-aqi-led-s-randomly-changing-colour/10342/2 "2024-09-26T18:12:49Z")

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Hi @AirFright

This is not intended LED behavior. If you haven’t already, please reach out to [contact@purpleair.com](mailto:contact@purpleair.com) to discuss troubleshooting. It would be appreciated if you could provide a video of the LEDs.

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**Author:** ![AirFright](https://avatars.discourse-cdn.com/v4/letter/a/f08c70/32.png) [@AirFright](https://community.purpleair.com/u/AirFright)\
**Post date:** [September 27, 2024, 2:49am UTC](https://community.purpleair.com/t/pa-zen-aqi-led-s-randomly-changing-colour/10342/4 "2024-09-27T02:49:12Z")

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Hi @Kieran  
I have sent you an email 🙂