Owner's Manual
Page 10
...on the indoor temperature. • Off: All systems are off. • Em Heat (only for heat pumps with auxiliary heat): Thermostat controls Emergency and Auxiliary Heat. Operating Manual System setting Press SYSTEM & FAN System & Fan Schedule Clock & More Press SYSTEM to ...03 Done M28083 Follow steps at left to select system: • Heat: Thermostat controls only the heating system. • Cool: Thermostat controls only the cooling system. • Auto: Thermostat automatically selects heating or cooling depending on how your thermostat was installed. 8 Compressor is locked out.
...on the indoor temperature. • Off: All systems are off. • Em Heat (only for heat pumps with auxiliary heat): Thermostat controls Emergency and Auxiliary Heat. Operating Manual System setting Press SYSTEM & FAN System & Fan Schedule Clock & More Press SYSTEM to ...03 Done M28083 Follow steps at left to select system: • Heat: Thermostat controls only the heating system. • Cool: Thermostat controls only the cooling system. • Auto: Thermostat automatically selects heating or cooling depending on how your thermostat was installed. 8 Compressor is locked out.
Owner's Manual
Page 19
... Clock & More M28089 Press MORE to reset reminder interval 60 Days Reset Next Done If activated during installation, the furnace filter reminder alerts you when it expires: 1. Press MORE, then NEXT. 2. Press RESET. 3. AFibltoeurtryeomuirndnewr thermostat RTH7400/RTH7500 Series Press RESET after changing the filter, to restart the timer. To reset the reminder interval...
... Clock & More M28089 Press MORE to reset reminder interval 60 Days Reset Next Done If activated during installation, the furnace filter reminder alerts you when it expires: 1. Press MORE, then NEXT. 2. Press RESET. 3. AFibltoeurtryeomuirndnewr thermostat RTH7400/RTH7500 Series Press RESET after changing the filter, to restart the timer. To reset the reminder interval...
Owner's Manual
Page 21
Even if the warning does not appear, you should replace batteries once a year, or before batteries are optional (to provide backup power) if your thermostat was wired to remove from wallplate M28103 Batteries are depleted. Insert 2 fresh AA alkaline batteries M28101 19 69-2222EF-03 Battery replacement RTH7400/RTH7500 Series Grasp thermostat and pull to run on AC power when installed. The warning flashes about 30 days before leaving home for more than a month. Install fresh batteries immediately when the LO BATT warning begins flashing.
Even if the warning does not appear, you should replace batteries once a year, or before batteries are optional (to provide backup power) if your thermostat was wired to remove from wallplate M28103 Batteries are depleted. Insert 2 fresh AA alkaline batteries M28101 19 69-2222EF-03 Battery replacement RTH7400/RTH7500 Series Grasp thermostat and pull to run on AC power when installed. The warning flashes about 30 days before leaving home for more than a month. Install fresh batteries immediately when the LO BATT warning begins flashing.
Owner's Manual
Page 23
...; Cool: 50° to 99°F (10° to 32°C). AInbcoausteyoouf rdnifefiwcutlhtyermostat RTH7400/RTH7500 Series If you have difficulty with your thermostat, please try the following suggestions. No response to Make sure heating and cooling temperatures are correctly installed (see page 19). not change) 21 69-2222EF-03 Display is blank •...
...; Cool: 50° to 99°F (10° to 32°C). AInbcoausteyoouf rdnifefiwcutlhtyermostat RTH7400/RTH7500 Series If you have difficulty with your thermostat, please try the following suggestions. No response to Make sure heating and cooling temperatures are correctly installed (see page 19). not change) 21 69-2222EF-03 Display is blank •...