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RTH2300/RTH221

19 69-2727ES—01

If you have difficulty with your thermostat, please try the following suggestions.

Most problems can be corrected quickly and easily.

Display is blank • Makesurefurnacedoorisclosedsecurely.

• MakesurefreshAAAalkalinebatteriesarecorrectlyinstalled(seepage

16).

Heating or cooling

system does not

respond

• SetsystemswitchtoHeat (see page 7). Make sure the temperature is

set higher than the Inside temperature.

• SetsystemswitchtoCool (see page 7). Make sure the temperature is

set lower than the Inside temperature.

• Wait5minutesforthesystemtorespond.

In case of difficulty

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User Manual - Page 21