La Crosse Measuring Tools & Sensors - Page 8 - Recent Questions, Troubleshooting & Support

Try your owners manual. http://www.equitybylacrosse.com/sites/default/files/30220_manual.pdf

After some time outside, corrosion occurs on the circuit board, when water enters the unit through the vent on the front of the sensor. The vent should not be blocked, as this will still result in corrosion due to condensation building up in the sensor. Corrosion will be less likely to occur, if the sensor is located away sources of humidity and falling water. I located mine in the shade on my deck, under an upsidedown flower pot.

need to reset it.

Hi George,I believe your Equity wireless thermometer is manufactured by LaCrosse Technology. Here is a link to their website:http://www.lacrossetechnology.com/From this page, you can search the type of wireless thermometer or weather station you're trying to use. (You didn't specify a model number in your request).Also notice that there is link on that page for Support; clicking that will take you to the Manuals link. You will need to find your proper model number in the drop-down menu.Also, there is a Contact link, so you can contact them directly for further assistance if you are unable to find your model's information.Good luck, George! Hope this helps!