Ravinia atomic Alarm Clock needs temperature to go to fahrenheit but I don't know how. Please advise.

HITO 6 Alarm Clock Date and Temperature Display

--- SCANNED INSTRUCTIONS ---
CLOCK AND DATE SETTING: 1. Press and hold MODE button for three seconds. The minutes display will begin flashing. Press MODE button to switch among minutes, hour, 12/24 hour, month and day. 2. Press ADJ button to set value of the minutes, hour, 12/24 hour, month and day. NOTE: Original screen will return after one minute of inactivity. To view the date, press ADJ button.
ALARM CLOCK SETTING: 1. Short press MODE button to switch from clock to alarm clock. 2. Press the ADJ button once to make the D))))) symbol appear, which will indicate that the alarm is on. Press ADJ button again and a bell symbol will appear, indicating hour notification signal is on. The hour notification signal
sounds once at the top of every hour. Press ADJ button again to activate alarm clock and hour notification signal, press ADJ button again to clear all.
MEMORY FUNCTION: 1. Press the MEMORY button for maximum temperature and humidity to display. Press MEMORY button again for minimum temperature and humidity to display. Press MEMORY button again to return to current temperature and humidity. 2. Press and hold MEMORY button for three seconds to clear maximum temperature, minimum temperature and relative humidity.
COMFORT DISPLAY: When temperature remains between 68F to 82F (20C to 28C) and the relative humidity remains between 50% and 70% "COMFORT" will be displayed. When relative humidity is above 70% "WET" will be displayed. When relative humidity is below 50% "DRY" will be displayed.
FAHRENHEIT/CELSIUS: To switch between Fahrenheit and Celsius, press FAHRENHEIT/CELSIUS SELECTOR button on back of unit.
INSTALLATION: 1. Use provided suction cups to position the sensor probes in the terrarium. 2. Position THERMOMETER & HYGROMETER in desired location outside of terrarium with a built-in stand.
BATTERY TYPE: 1 PC Button cell (AG13/LR44)
WARNING: Install THERMOMETER & HYGROMETER and sensor probe out of reach of pets and away from water.
For more information about All Living Things products, please call 1-800-806-7870.

switch in the back changes the setting

The ice warning is normally only on channel 1. Just set wireless sensor to channel 2 or 3, then select that same channel to display on the base unit.
If you don't ever want to use the ice warning feature, then use channel 1 for a sensor that's situated indoors, then hope you never hear it!!!
Lee

with the switch in the 'lock' position, hit the C/F button (also labeled as the 'min' & 'date' button)

please read this answer:
http://www.fixya.com/support/t3486802-set_clock

hello lucy... you most likely have some corrosion in the outdoor component. Remove the batteries from the outdoor component and clean the battery contacts with the eraser end of a common pencil. Reinstall the batteries and then give it up to 8 hours to start reporting accurately again. Joe

Thanks for choosing Fixya!

When the clock is in time mode the temperature is in the lower right hand corner. In this mode pressing the down arrow button will cycle from celsius to fahrenheit to seconds and then back to celsius.

Online manual is at link http://skyscan.info/content/manuals/25-model-87315.html

After replacing the transmitter batteries several times, I tried replacing the clock batteries. They must have been getting low. Once I put in new batteries in the clock it worked fine. Good Luck.