Digital thermostats provide precise control and cycle faster than older mechanical models. The system
turns on and off more frequently, but runs for a shorter time. If you would like to increase cycle time,
choose SLO for slow cycle in the Installer menu. (Reference menu items 30, 32 & 35) If an acceptable
cycle rate is not achieved, contact your HVAC service person.
Symptom:
Possible Cause:
Corrective Action.
“Call for Service” icon appears on
displayed:
1. Heating system is not able to heat the space to within 10 degrees of the setpoint
within 2 hours
2. Cooling system is not able to cool the space to within 10 degrees of the setpoint
within 2 hours
3. If “–” is displayed for the Room Temperature, a replacement thermostat is needed
4. None of the buttons operate on the thermostat
5. If “Call for Service” is flashing, compressor self diagnostic is detecting
an issue with the outdoor unit:
1. See corrective action for “No Heat”
2. See corrective action for “No Cool”
3. Replace thermostat
4. Make sure keypad lockout is not turned on ( ), If it’s OFF, try reset shown below.
5. Contact a service person to verify the outdoor equipment is operating correctly.
Heat pump system runs heat in cool mode/cool in heat mode:
Changeover “O/B” set incorrectly
Use configuration to switch “O” to “B” or “B” to “O.
Resetting the Thermostat or Thermostat Settings
If the thermostat has good batteries, but has a blank display or does not respond to key presses, the
thermostat should be reset by removing the batteries for 2 minutes. This reset will not change the
menu settings or program. If the condition persists after reinstalling the batteries, replace the
thermostat.
To conveniently reset only the schedule and user settings back to factory defaults, press Menu and
Backlight buttons at the same time and hold until the display goes blank and resets.
CONTACT US
Customer support: 877.654.9394 or wr.techsupport@emerson.com
MERCURY NOTICE
This product does not contain mercury. However, this product may replace a product that contains
mercury. Mercury and products containing mercury must not be discarded in household trash. Refer to
thermostat-recycle.org for location to send product containing mercury.
FOR CALIFORNIA RESIDENTS
Warning: This product contains a chemical known to the state of California to cause cancer and birth
defects and other reproductive harm.
White-Rodgers Universal Thermostat Manual UP310, 7-Day Schedule – Optimized PDF
White-Rodgers Universal Thermostat Manual UP310, 7-Day Schedule – Original PDF
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