10
Specifications
Temperature Ranges
Heat: 32 °F to 90 °F (0 °C to 32.0 °C)
Cool: 50 °F to 99 °F (10.0 °C to 37.0 °C)
Operating Ambient Temperature
32 °F to 102 °F (0 °C to 38.9 °C)
Shipping Temperature
20 °F to 120 °F (28.9 °C to 48.9 °C)
Operating Relative Humidity
5% to 90% (non-condensing)
Physical Dimensions in inches (mm) (H x W x D)
Thermostat: 3.86” H x 5.36” W x 1.08” D
(98 mm H x 136 mm W x 27.4 mm D)
Decorative Cover Plate – Small; size:
4.72” H X 5.9” W (120 mm H X 150 mm W)
Electrical Ratings
Terminal Voltage (50Hz/60Hz) Running Current
W Heating 20 Vac30 Vac 0.02 A1.0 A
W2 (Aux) Heating (TH3210U only) 20 Vac30 Vac 0.02 A1.0 A
E Emergency Heat (TH3210U only) 20 Vac30 Vac 0.02 A0.5 A
Y Compressor Stage 1 20 Vac30 Vac 0.02 A1.0 A
G Fan 20 Vac30 Vac 0.02 A0.5 A
O/B Changeover 20 Vac30 Vac 0.02 A0.5 A
Troubleshooting
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 for heating & cooling system is on.
• Make sure furnace door is closed securely.
• Make sure fresh AA alkaline batteries are correctly installed (see page 2).
Heating or cooling
system does not
respond
• Press Mode button to set system Heat (see page 5). Make sure the desired
temperature is set higher than the inside temperature.
• Press Mode button to set system Cool (see page 5). Make sure the desired
temperature is set lower than the inside temperature.
• Check circuit breaker and reset if necessary.
• Make sure power switch for heating & cooling system is on.
• Make sure furnace door is closed securely.
• Wait 5 minutes for the system to respond.
“Cool On” or
“Heat On” is
flashing
• Compressor protection feature is engaged. Wait 5 minutes for the system to
restart safely, without damage to the compressor.
Aux heat runs in
cooling
• For heat pump systems, verify there is not a wire attached to W on UWP systems.
See “Wiring heat pump systems” on page 4.
Cool runs with a
call for heat
• For heat pump systems, verify there is not a wire attached to W on UWP systems.
See “Wiring heat pump systems” on page 4.