# Troubleshooting **URL:** https://community.purpleair.com/c/sensors/troubleshooting/17.md?page=1 [Latest](https://community.purpleair.com/latest.md) · [Categories](https://community.purpleair.com/categories.md) **Page:** 2 --- ## [Wi-Fi Troubleshooting](https://community.purpleair.com/t/wi-fi-troubleshooting/7171)
**Author:** [@PurpleAir](https://community.purpleair.com/u/PurpleAir)\ **Replies:** 0\ **Last updated:** [June 14, 2024, 11:00pm UTC](https://community.purpleair.com/t/wi-fi-troubleshooting/7171 "2024-06-14T23:00:00Z")
This article walks you through connecting a PurpleAir sensor to WiFi. Once you have successfully completed a section, continue to the next section below or follow a link if provided. Troubleshooting steps are included f… --- ## [Outdoor Power supply failure (PurpleAir Recommended power supply)](https://community.purpleair.com/t/outdoor-power-supply-failure-purpleair-recommended-power-supply/14401)
**Author:** [@TRWeasle](https://community.purpleair.com/u/TRWeasle)\ **Replies:** 1\ **Last updated:** [June 29, 2025, 3:45pm UTC](https://community.purpleair.com/t/outdoor-power-supply-failure-purpleair-recommended-power-supply/14401 "2025-06-29T15:45:20Z")
Bought my sensor in Jan 2025 with the recommended outdoor power supply by Globtek. Just noticed that my sensor was offline (and has been for 4 days) and went to investigate. The power supply seems to have conked out. … --- ## [Custom data processor not receiving data?](https://community.purpleair.com/t/custom-data-processor-not-receiving-data/380)
**Author:** [@axo](https://community.purpleair.com/u/axo)\ **Replies:** 5\ **Last updated:** [June 16, 2025, 9:27pm UTC](https://community.purpleair.com/t/custom-data-processor-not-receiving-data/380 "2025-06-16T21:27:38Z")
A few hours ago I registered my device, and added a custom data processor. Unfortunately, my data processor is not receiving any data, or even apparently any connection attempts. Has anyone else encountered this issue … --- ## [Problems Connecting a Sensor with a Laptop](https://community.purpleair.com/t/problems-connecting-a-sensor-with-a-laptop/12653)
**Author:** [@Head](https://community.purpleair.com/u/Head)\ **Replies:** 1\ **Last updated:** [June 4, 2025, 9:36pm UTC](https://community.purpleair.com/t/problems-connecting-a-sensor-with-a-laptop/12653 "2025-06-04T21:36:03Z")
having problem to set up purple air in laptop --- ## [Purple Air sensor number](https://community.purpleair.com/t/purple-air-sensor-number/12410)
**Author:** [@Mark\_Spencer](https://community.purpleair.com/u/Mark_Spencer)\ **Replies:** 4\ **Last updated:** [May 13, 2025, 5:23pm UTC](https://community.purpleair.com/t/purple-air-sensor-number/12410 "2025-05-13T17:23:08Z")
How can I recover my sensor ID number? It’s working fine and I can see it on the map (Brentwood Fiano Ln) Please advise. email ms2496@gmail.com Thanks Mark Spencer --- ## [Can a PA Flex connect to 802.1x wifi?](https://community.purpleair.com/t/can-a-pa-flex-connect-to-802-1x-wifi/12266)
**Author:** [@geo-allen](https://community.purpleair.com/u/geo-allen)\ **Replies:** 2\ **Last updated:** [May 6, 2025, 5:46pm UTC](https://community.purpleair.com/t/can-a-pa-flex-connect-to-802-1x-wifi/12266 "2025-05-06T17:46:35Z")
Can a PA Flex connect to 802.1x wifi? That’s all that is available at a location I need to deploy a PA. Thanks. --- ## [Flex sensor went offline, red power led is on](https://community.purpleair.com/t/flex-sensor-went-offline-red-power-led-is-on/12008)
**Author:** [@MihkelPin](https://community.purpleair.com/u/MihkelPin)\ **Replies:** 1\ **Last updated:** [April 2, 2025, 8:30pm UTC](https://community.purpleair.com/t/flex-sensor-went-offline-red-power-led-is-on/12008 "2025-04-02T20:30:19Z")
Hi, Could you help me please with my Flex sensor issue. ca 7 days ago my PA-II-FLEX went offline on the map in outdoors. I went investigating and there was only red power led light on, but no other lights that is showi… --- ## [Sensor has wildly wrong temperature](https://community.purpleair.com/t/sensor-has-wildly-wrong-temperature/10733)
**Author:** [@richard47](https://community.purpleair.com/u/richard47)\ **Replies:** 8\ **Last updated:** [March 6, 2025, 3:02pm UTC](https://community.purpleair.com/t/sensor-has-wildly-wrong-temperature/10733 "2025-03-06T15:02:41Z")
This sensor in Barcelona shows the temperature as 97 degrees F (36 C) which cannot be correct. Not sure how the community can help but they said to post this here. --- ## [Sensor shows on map - MyPurpleAir App stopped showing data](https://community.purpleair.com/t/sensor-shows-on-map-mypurpleair-app-stopped-showing-data/11791)
**Author:** [@mwvanorder](https://community.purpleair.com/u/mwvanorder)\ **Replies:** 0\ **Last updated:** [March 1, 2025, 1:35am UTC](https://community.purpleair.com/t/sensor-shows-on-map-mypurpleair-app-stopped-showing-data/11791 "2025-03-01T01:35:27Z")
The Purple Air sensor is working fine and delivering data to the map. However, the MyPurpleAir app stopped updating. The MyPurpleAir App finds the sensor when you do a search but doesn’t show any info for the sensor. … --- ## [Temperature readings are extremely high](https://community.purpleair.com/t/temperature-readings-are-extremely-high/11722)
**Author:** [@sheld34x](https://community.purpleair.com/u/sheld34x)\ **Replies:** 3\ **Last updated:** [February 28, 2025, 5:32pm UTC](https://community.purpleair.com/t/temperature-readings-are-extremely-high/11722 "2025-02-28T17:32:10Z")
Hello I’m brand-new here to the purpleair family. I just installed my sensor this week and every day the temperature readings are not even close to what the actual ambient temperature is. For example, today the outside… --- ## [Outdoor sensor detached](https://community.purpleair.com/t/outdoor-sensor-detached/11171)
**Author:** [@UntitledNo1](https://community.purpleair.com/u/UntitledNo1)\ **Replies:** 1\ **Last updated:** [January 16, 2025, 8:52pm UTC](https://community.purpleair.com/t/outdoor-sensor-detached/11171 "2025-01-16T20:52:14Z")
Hadn’t checked in a while and when I looked on the map and saw nothing came to discover the sensor had come apart from the adapter. Not sure how long but reattaching it hasn’t helped yet. ALSO, my email address wasn’t … --- ## [Sensor (Laser Counter) Replacement](https://community.purpleair.com/t/sensor-laser-counter-replacement/7791)
**Author:** [@PurpleAir](https://community.purpleair.com/u/PurpleAir)\ **Replies:** 5\ **Last updated:** [December 30, 2024, 1:38pm UTC](https://community.purpleair.com/t/sensor-laser-counter-replacement/7791 "2024-12-30T13:38:04Z")
Sometimes, the laser counters (or channels) in a PurpleAir device can fail for a number of reasons. This article is meant to guide you through purchasing and installing replacement laser counters for your device. We al… --- ## [SD card not detected after removal and putting back in](https://community.purpleair.com/t/sd-card-not-detected-after-removal-and-putting-back-in/10785)
**Author:** [@MihkelPin](https://community.purpleair.com/u/MihkelPin)\ **Replies:** 1\ **Last updated:** [December 13, 2024, 6:13pm UTC](https://community.purpleair.com/t/sd-card-not-detected-after-removal-and-putting-back-in/10785 "2024-12-13T18:13:18Z")
Hi, Our PA-II-FLEX 7.04 has been running with no issues for several months. Now we have issue that in the map.purpleair.com it shows that SD logger is not detected. In mid November I disconnected power cable from t… --- ## [PA Zen SD Card & LED Issue](https://community.purpleair.com/t/pa-zen-sd-card-led-issue/10678)
**Author:** [@AirFright](https://community.purpleair.com/u/AirFright)\ **Replies:** 1\ **Last updated:** [November 15, 2024, 12:37pm UTC](https://community.purpleair.com/t/pa-zen-sd-card-led-issue/10678 "2024-11-15T12:37:58Z")
Hi I am having an issue with my PurpleAir Zen monitor that I believe is power related but I am still unsure. When I power up the sensor, it turns on Blue for about 15 seconds, then goes to Green. After about 1 minute o… --- ## [Monitor in Guatemala Not Storing Data](https://community.purpleair.com/t/monitor-in-guatemala-not-storing-data/10664)
**Author:** [@Bennett](https://community.purpleair.com/u/Bennett)\ **Replies:** 1\ **Last updated:** [November 12, 2024, 4:25pm UTC](https://community.purpleair.com/t/monitor-in-guatemala-not-storing-data/10664 "2024-11-12T16:25:30Z")
Hello, I work with a community-based organization in Guatemala and left a monitor with them (PurpleAir Classic Air Quality Monitor × 1, PurpleAir Classic Air Quality Monitor / PA-II-SD). They have been using it successf… --- ## [Phone not connecting to Purple Air Sensor](https://community.purpleair.com/t/phone-not-connecting-to-purple-air-sensor/10617)
**Author:** [@Slavkinb](https://community.purpleair.com/u/Slavkinb)\ **Replies:** 1\ **Last updated:** [November 5, 2024, 5:45pm UTC](https://community.purpleair.com/t/phone-not-connecting-to-purple-air-sensor/10617 "2024-11-05T17:45:26Z")
My Cellphone isn’t seeing the Purple Air network in wifi. It saw it once, not sure if it connected and not seeing it again. --- ## [How to reset a downgraded channel](https://community.purpleair.com/t/how-to-reset-a-downgraded-channel/10413)
**Author:** [@Kalynka](https://community.purpleair.com/u/Kalynka)\ **Replies:** 3\ **Last updated:** [October 11, 2024, 4:13pm UTC](https://community.purpleair.com/t/how-to-reset-a-downgraded-channel/10413 "2024-10-11T16:13:46Z")
Sensor RIO401101 seems to have the wrong channel downgraded. A seems to be reading coherently while B even after cleaning is still reading straight line 0 all which doesn’t seem correct. Is there a way to reset the chann… --- ## [PA Zen AQI LED’s Randomly Changing Colour](https://community.purpleair.com/t/pa-zen-aqi-led-s-randomly-changing-colour/10342)
**Author:** [@AirFright](https://community.purpleair.com/u/AirFright)\ **Replies:** 2\ **Last updated:** [September 27, 2024, 2:49am UTC](https://community.purpleair.com/t/pa-zen-aqi-led-s-randomly-changing-colour/10342 "2024-09-27T02:49:12Z")
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 sec… --- ## [Checking the 6-inch Internal Adaptor Cable](https://community.purpleair.com/t/checking-the-6-inch-internal-adaptor-cable/5486)
**Author:** [@PurpleAir](https://community.purpleair.com/u/PurpleAir)\ **Replies:** 0\ **Last updated:** [July 14, 2023, 7:47pm UTC](https://community.purpleair.com/t/checking-the-6-inch-internal-adaptor-cable/5486 "2023-07-14T19:47:00Z")
The PurpleAir Classic, PurpleAir Classic SD, and the discontinued PA-I Indoor contain an internal adaptor cable that can cause power issues. This guide will walk you through opening up the sensors to test the internal ad… --- ## [PA-II-Flex: sensor not reporting; current status not received](https://community.purpleair.com/t/pa-ii-flex-sensor-not-reporting-current-status-not-received/10080)
**Author:** [@Michelle\_R](https://community.purpleair.com/u/Michelle_R)\ **Replies:** 1\ **Last updated:** [August 26, 2024, 10:19pm UTC](https://community.purpleair.com/t/pa-ii-flex-sensor-not-reporting-current-status-not-received/10080 "2024-08-26T22:19:22Z")
Hello, I installed, connected, configured and registered my PA-II-Flex sensor, but when I go to the purpleair live map and click on it, it says that the sensor is not reporting this parameter / current status not receive… --- ## [Associated Email vs. Owner's Email](https://community.purpleair.com/t/associated-email-vs-owners-email/643)
**Author:** [@Amanda\_Hawkins](https://community.purpleair.com/u/Amanda_Hawkins)\ **Replies:** 2\ **Last updated:** [August 23, 2024, 7:47pm UTC](https://community.purpleair.com/t/associated-email-vs-owners-email/643 "2024-08-23T19:47:08Z")
Associated Email vs. Owner’s Email and What’s the Difference? When registering a PurpleAir sensor, you’ll encounter two separate email fields: Associated Email Owner’s Email Understanding their roles will help e… --- ## [PA-II crashes continually with Exception 29](https://community.purpleair.com/t/pa-ii-crashes-continually-with-exception-29/10025)
**Author:** [@charlie](https://community.purpleair.com/u/charlie)\ **Replies:** 0\ **Last updated:** [August 16, 2024, 6:36pm UTC](https://community.purpleair.com/t/pa-ii-crashes-continually-with-exception-29/10025 "2024-08-16T18:36:48Z")
I need help troubleshooting why my PA-II-Flex is in a crash loop. My PA-II has been working intermittently for several months now. I thought it was a poor wifi connection, but I’ve investigated it more thoroughly with t… --- ## [Sensor power supply](https://community.purpleair.com/t/sensor-power-supply/9790)
**Author:** [@EJONES](https://community.purpleair.com/u/EJONES)\ **Replies:** 3\ **Last updated:** [August 12, 2024, 8:59pm UTC](https://community.purpleair.com/t/sensor-power-supply/9790 "2024-08-12T20:59:32Z")
I set my sensor up in the Facility and it was online and working. It was moved to the roof where they had a solar power supply of 12V/10A solar charge controller. I can’t get it back online. I noticed the power supply … --- ## [PM & Particle Count Disagreement](https://community.purpleair.com/t/pm-particle-count-disagreement/9639)
**Author:** [@Me912](https://community.purpleair.com/u/Me912)\ **Replies:** 2\ **Last updated:** [August 9, 2024, 12:16pm UTC](https://community.purpleair.com/t/pm-particle-count-disagreement/9639 "2024-08-09T12:16:54Z")
Hi Everyone Is it normal for there to be such a big difference between the PM readings and the Particle Count/dL readings? I am a bit concerned my sensor is not reading correctly. Thank you --- ## [AirMonitor\_xxxx connection errors](https://community.purpleair.com/t/airmonitor-xxxx-connection-errors/9592)
**Author:** [@ARA\_Rob\_Fisher](https://community.purpleair.com/u/ARA_Rob_Fisher)\ **Replies:** 4\ **Last updated:** [July 29, 2024, 7:25pm UTC](https://community.purpleair.com/t/airmonitor-xxxx-connection-errors/9592 "2024-07-29T19:25:59Z")
Installing an outdoor sensor. Wifi shows up called AirMonitor\_4381. It tried to connect, but it say’s Unable to Join the network (mentioned above). Put in browser http://192.168.4.1/config. Unable to connect. --- ## [SD card showing as not detected after 24 hours](https://community.purpleair.com/t/sd-card-showing-as-not-detected-after-24-hours/4002)
**Author:** [@Joe\_Colombo](https://community.purpleair.com/u/Joe_Colombo)\ **Replies:** 3\ **Last updated:** [July 26, 2024, 8:40pm UTC](https://community.purpleair.com/t/sd-card-showing-as-not-detected-after-24-hours/4002 "2024-07-26T20:40:24Z")
I’m a new Flex user who has been running a sensor for about 2 weeks now. I installed an SD card, ensuring its read/write speed and card storage size was compatible with my Flex. The SD card is detected when I boot up the… --- ## [Temperature](https://community.purpleair.com/t/temperature/9254)
**Author:** [@Steve\_Frith](https://community.purpleair.com/u/Steve_Frith)\ **Replies:** 1\ **Last updated:** [July 23, 2024, 2:23am UTC](https://community.purpleair.com/t/temperature/9254 "2024-07-23T02:23:13Z")
My sensor seems to be at least 2-3 C cooler than actual outside air temperature. Can this be fixed somehow? Thank you. --- ## [Sensor reads zero](https://community.purpleair.com/t/sensor-reads-zero/9251)
**Author:** [@morgill](https://community.purpleair.com/u/morgill)\ **Replies:** 1\ **Last updated:** [July 22, 2024, 5:16pm UTC](https://community.purpleair.com/t/sensor-reads-zero/9251 "2024-07-22T17:16:37Z")
My sensor map reading is almost consistently 0, occasionally reading 1 or 2 when multiple sensors around me on the map, sensors in my neighborhood, all read much higher, all consistent with each other. I may have made th… --- ## [Unable to connect to Wifi in Guatemala](https://community.purpleair.com/t/unable-to-connect-to-wifi-in-guatemala/9205)
**Author:** [@willmskinner](https://community.purpleair.com/u/willmskinner)\ **Replies:** 0\ **Last updated:** [July 16, 2024, 11:13pm UTC](https://community.purpleair.com/t/unable-to-connect-to-wifi-in-guatemala/9205 "2024-07-16T23:13:21Z")
Hello, we have recently relocated to Guatemala and brought a PurpleAir Zen with us. I have followed the steps for connecting to WiFi carefully, and I get successfully to the page where you select the wifi network and en… --- ## [BME Troubleshooting (temperature, humidity, pressure, and VOCs)](https://community.purpleair.com/t/bme-troubleshooting-temperature-humidity-pressure-and-vocs/6441)
**Author:** [@PurpleAir](https://community.purpleair.com/u/PurpleAir)\ **Replies:** 0\ **Last updated:** [November 22, 2023, 9:49pm UTC](https://community.purpleair.com/t/bme-troubleshooting-temperature-humidity-pressure-and-vocs/6441 "2023-11-22T21:49:00Z")
This article will walk you through troubleshooting steps for your device’s BME sensor. The BME measures temperature, humidity, and pressure. Some BME sensors also measure VOCs. Raw temperature and humidity readings can… [Previous page](https://community.purpleair.com/c/sensors/troubleshooting/17.md) [Next page](https://community.purpleair.com/c/sensors/troubleshooting/17.md?page=2)