White-Rodgers 70 Series Thermostat Line Extension
40
Troubleshooting
Symptom
Possible Cause
Corrective Action
Heat, Cool or Fan
Runs Constantly
Possible short in wiring, thermostat, heat, cool or fan system
Check each wire connection to verify they are not
shorted or touching other wires. Reset the
thermostat, replace thermostat if condition
persists.
Thermostat Display & Thermometer
Disagree
Thermostat display requires adjustment
Display can be ad/-5°. See Installer Menu
item 81
Furnace (Air Conditioner) Cycles Too
Fast or Slow (narrow or wide
temperature swing)
The location of the thermostat and/or the size of the Heating
System may be influencing the cycle rate
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 & 35) If
an acceptable cycle rate is not achieved verify
equipment is sized properly.
“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
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
(denoted by icon)
5.) Verify the equipment is operating correctly
