Temp dispayed in celsius.

The first link is operators manual.

The second is installation and contains the procedure to set many functions including the display temperature.

https://customer.honeywell.com/resources/techlit/TechLitDocuments/69-0000s/69-2577ES.pdf

See page 15 function set 14. This sets F or C temperature
https://customer.honeywell.com/resources/techlit/TechLitDocuments/69-0000s/69-2578ES.pdf

hope this helps?

Press and hold up and down temp buttons together to enter settings menu. Then press up to option 14. Press down to change to option 0 (Fahrenheit). 1 is Celsius. Press up and down together to save and exit. Good Luck!!

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Just go to this webpage, it is explained in detail: with conversion table and formulas

http://www.rapidtables.com/convert/temperature/celsius-to-fahrenheit.htm

http://www.rapidtables.com/convert/temperature/celsius-to-fahrenheit.htm

Fahrenheit to celsius conversion

Convert Celsius to Fahrenheit and Fahrenheit to Celsius

Press and hold the up arrow and fan buttons until the display changes. Then press Next until you see 14 in the display. Change this value to 1 (with the up and down arrows) to get Celsius. (O is Fahrenheit.) Press Done to exit and save the setting.

The manual is available here: http://customer.honeywell.com/Honeywell/ProductInfo.aspx/TH6110D1005 . Scroll to the bottom and choose a manual then press Download. This particular section is in the Installer's Guide.

I hope this helps.

Cindy Wells

this is correct there should be an adjusting screw @ C terminal that you should have to tighten for fahrenheit

Push the up and down arrow keys on your remote simultaneously for at least 3 seconds to toggle between Fahrenheit and
Celsius units.

Convert Fahrenheit to Celsius
Tc = (5/9)*(Tf-32)

Convert Celsius to Fahrenheit
Tf = (9/5)*Tc+32
where Tc is Temp in Celsius and Tf is temp in fahrenheit

You can switch the temperature mode between Fahrenheit to Celsius as follows:
While depressing the AUTO button, depress the OFF button for 3 seconds or more. The display will change from Fahrenheit to Celsius, or from Celsius to Fahrenheit."

When you do your system setup, Function 320 controls your temp. format. Set Function 320 to 1(celsius); Then press DONE. This will solve your problem.( Function 320 is defaulted to 0-Farenheit).

My thermostat was set on celsius and couldn't get it to change back to fahrenheit. My son suggested pressing both up and down arrow buttons at the same time and it worked. It changed back to fahrenheit.