Honeywell RTH7500 Owner's Manual - Page 23

About your new thermostat, In case of difficulty - problems

Page 23 highlights

AInbcoausteyoouf rdnifefiwcutlhtyermostat RTH7400/RTH7500 Series If you have difficulty with your thermostat, please try the following suggestions. Most problems can be corrected quickly and easily. Display is blank • Check circuit breaker and reset if necessary. • Make sure power switch at heating & cooling system is on. • Make sure furnace door is closed securely. • If thermostat is battery powered, make sure fresh AA alkaline batteries are correctly installed (see page 19). No response to Make sure heating and cooling temperatures are set to acceptable ranges: key presses (or • Heat: 40° to 90°F (4.5° to 32°C). temperature will • Cool: 50° to 99°F (10° to 37°C). not change) 21 69-2222EF-03

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RTH7400/RTH7500 Series
21
69-2222EF—03
About your new thermostat
In case of difficulty
If you have difficulty with your thermostat, please try the following suggestions.
Most problems can be corrected quickly and easily.
Display is blank
Check circuit breaker and reset if necessary.
Make sure power switch at heating & cooling system is on.
Make sure furnace door is closed securely.
If thermostat is battery powered, make sure fresh AA alkaline
batteries are correctly installed (see page 19).
No response to
key presses (or
temperature will
not change)
Make sure heating and cooling temperatures are set to acceptable ranges:
Heat: 40° to 90°F (4.5° to 32°C).
Cool: 50° to 99°F (10° to 37°C).