Question about Honeywell Programmable Thermostat Heater

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Switching thermostat from farenheit to celsius

I have a Honeywell RTH7400D programmable thermostat installed and working fine, except that I cannot change the display settings from farenheit to celsius. The package stated that it was both farenheit and celsius capable but the manual does not tell you how to switch it. I live in Canada - everything is in celsius except my thermostat.

A solution would be greatly appreciated.

Dale.

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  • FCA2007 Feb 17, 2008

    Awesome, it works! Thank you so much! The manual that came with the thermostat did not include those instructions. After 3 years af making do, converting from farenheit to celsius, the thermostat now reads celcius like evry other thermometer and forecast!

  • cameronandre Aug 25, 2008

    I have a honeywell thermostat I just got but I cant figure how to change the fahrenheit to celsius - any ideas?

  • Eryn Mlynarski Sep 29, 2011

    what did you end up doing to switch it over?

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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.

Posted on Jul 27, 2009

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It's in the installer setup programming.

#0320 0 = F 1 = C

www.homedepot.ca/wcsstore/HomeDepotCanada/images/catalog/1bc8473d-6394-4800-a8a7-86c96633b2aa.pdf

Page 34

Geno

Posted on Feb 17, 2008

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