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Troubleshooting
If you have difficulty with your thermostat, please try the following suggestions.
Most problems can be corrected quickly and easily.
Display is
blank
Heating
or cooling
system does
not respond
Temperature
settings do
not change
"Cool On" or
"Heat On" is
flashing
"Heat On" is
not displayed
"Cool On" is
not displayed
Specifications
Temperature Ranges
Heat: 40° to 90°F (4.5° to 32°C)
Cool: 50° to 99°F (10° to 37°C)
Operating Ambient Temperature
32° to 120°F (0° to 48.9°C)
Shipping Temperature
-20° to 120°F (-28.9° to 48.9°C)
Operating Relative Humidity
5% to 90% (non-condensing)
Physical Dimensions
3-13/16" H x 5-3/8" W x 1-1/4" D
97 mm H x 137 mm W x 32 mm D
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is
on.
• Make sure furnace door is closed securely.
• Make sure fresh AA alkaline batteries are correctly
installed (see page 2).
• Set system switch to Heat. Make sure the temperature is
set higher than the Inside temperature.
• Set system switch to Cool. Make sure the temperature is
set lower than the Inside temperature.
• Wait 5 minutes for the system to respond.
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).
• Compressor protection feature is engaged. Wait 5
minutes for the system to restart safely, without damage
to the compressor.
• Set the System switch to Heat, and set the
temperature level above the current room
temperature.
• Set the System switch to Cool, and set the
temperature level below the current room
temperature.
Electrical Ratings
System
Voltage (50/60Hz) Running Current
Heat (1st stage)
20-30 Vac
(Powerpile)
750 mV DC
Emergency heat
20-30 Vac
Auxiliary heat
20-30 Vac
Cooling
20-30 Vac
7
0.02-1.0 A
100 mA DC
0.02-1.0 A
0.02-1.0 A
0.02-1.0 A
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