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)
Electrical Ratings
Terminal
W Heating
W2 (Aux) Heating (TH3210U only)
E Emergency Heat (TH3210U only)
Y Compressor Stage 1
G Fan
O/B Changeover
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
"Cool On" or
"Heat On" is
flashing
Aux heat runs in
cooling
Cool runs with a
call for heat
• 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).
• 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.
• Compressor protection feature is engaged. Wait 5 minutes for the system to
restart safely, without damage to the compressor.
• For heat pump systems, verify there is not a wire attached to W on UWP systems.
See "Wiring heat pump systems" on page 4.
• For heat pump systems, verify there is not a wire attached to W on UWP systems.
See "Wiring heat pump systems" on page 4.
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)
Voltage (50Hz/60Hz)
20 Vac-30 Vac
20 Vac-30 Vac
20 Vac-30 Vac
20 Vac-30 Vac
20 Vac-30 Vac
20 Vac-30 Vac
10
Running Current
0.02 A-1.0 A
0.02 A-1.0 A
0.02 A-0.5 A
0.02 A-1.0 A
0.02 A-0.5 A
0.02 A-0.5 A