hmmmmm....anything is possible but that doesn't sound right. I was going to recommend checking the English/Metric settings, but I'm not sure if that has any affect on the humidity. Check the owners manual on how to check your settings.
Here's how to do it for the small display:
1. Press and hold AUTO SELECT.
2. WHILE HOLDING AUTO SELECT, press MAX. The display will show
12:00 if this is the original setup or if there is no backup battery and
there has been a power outage. Otherwise it will show the correct time.
The MAX and MIN LED’s will be on and the colon will be blinking.
3. You are now in the setup mode.
TO SET THE DISPLAYS FOR ENGLISH OR METRIC (DISPLAY IN THE SETUP MODE):
TEMPERATURE, DEW POINT AND WIND CHILL
1. The display is in the setup mode.
Press TEMPERATURE. The display will show or .
“0” indicates that the temperatures are in Fahrenheit. "1" indicates that the
2.
3. Press MAX or MIN to change from Metric or English.
4. If you are finished with the setup mode, press AUTO SELECT.
How's the air temperature?