Dew point and Relative Humidity very inaccurate

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  • Updated 1 year ago
I've been watching my dew point and relative humidity and the numbers are just wrong. I found this older thread https://support.acurite.com/acurite/topics/outdoor-humidity-stuck-at-98-f which seems to indicate my exact problem (all day the relative humidity is being reported at exactly 98% which leads to the crazy dew point temperatures - well above 90 degrees F). I followed the advice on that thread, and brought the 5-in-1 unit indoors, replaced batteries on sensor and console, and switched the pins from A to B on both units. No dice. The sensor never reported the indoor humidity correctly. Attached is a photo of the steady-state of the sensor while indoors. You can see the upper right (76 degrees indoors 96% humidity) vs. the middle left (75 degrees indoors 52% humidity). I also looked here: https://www.acurite.com/temperature-and-humidity-sensor-replacement-for-5-in-1-weather-sensors.html to sadly learn my sensor is "not compatible" - do I have any options at this point?



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Bill

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Posted 1 year ago

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George D. Nincehelser

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Assuming your 5n1 sensor isn't terribly old, you can still replace the the temp/humidity sensor module with a little work.

The catch is that you have to be willing to cut off the connecter on the replacement module and solder the 4 wires directly to the main board.

Acurite doesn't support this, of course, so you're on your own, but it does work.

It's not compatible with 5n1s from roughly 2012 or earlier, though.   Those early 5n1s used a different  temp/humidity setup.
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AcuRite Rachell, Employee

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Hello Bill,

If the sensor is not compatible with the temperature and humidity board replacement, we do recommend replacing the sensor if it is outside of its one year warranty period.  When was this unit purchased? Thank you.
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Bill

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Purchased ~June or July of 2015
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AcuRite Tori

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Hello Bill,

At this time since the sensor is over the 1 year warranty we would recommend purchasing a new outdoor sensor. Thank you.