HOMEOWNER HELP LINE: 1-800-284-2925
Thermostat Model Number
1F95-1231PL
TROUBLESHOOTING
Reset Operation
Note: When thermostat is reset, installer configuration menu settings
and programming will reset to factory settings .
If a voltage spike or static discharge blanks out the display or causes
erratic thermostat operation, you can reset the thermostat by remov-
ing the wires from terminals
R and C (do not short them together)
and removing batteries for 2 minutes . After resetting the thermostat,
Symptom
Possible Cause
Corrective Action
No Heat/No Cool/No Fan
(common problems)
1 . Blown fuse or tripped circuit breaker .
2 . Heat Pump power switch to OFF .
3 . Heat Pump blower compartment door or
panel loose or not properly installed .
4 . Loose connection to thermostat or system .
Replace fuse or reset breaker .
Turn switch to ON .
Replace door panel in proper position to engage safety
interlock or door switch .
Tighten connections .
No Heat
1 . Heat Pump Lock-Out Condition . Heat
may also be intermittent .
2 . Heating system requires service or
thermostat requires replacement .
Many heat pumps have safety devices that shut down
when a lock-out condition occurs . If the heat works
intermittently contact your HVAC service person for
assistance .
Diagnostic: Set SYSTEM Switch to HEAT and raise the
setpoint above room temperature . Within a few seconds
the thermostat should make a soft click sound . This sound
usually indicates the thermostat is operating properly . If
the thermostat does not click, try the reset operation listed
above . If the thermostat does not click after being reset
contact your heating and cooling service person . If the
thermostat clicks, contact your HVAC service person to
verify the heating is operating correctly .
No Cool
1 . Cooling system requires service or
thermostat requires replacement .
Same as diagnostic for No Heat condition except set the
thermostat to
COOL and lower the setpoint below the
room temperature . There may be up to a five minute delay
before the thermostat clicks in Cooling .
Heat, Cool or Fan
Runs Constantly
1 . Possible short in wiring .
2 . Possible short in thermostat .
3 . Possible short in heat/cool/fan system .
4 . FAN Switch set to Fan
ON .
Check each wire connection to verify they are not shorted
or touching together . No bare wire should stick out from
under terminal block . Try resetting the thermostat as
described above . If the condition persists your HVAC
service person can instruct you on how to test the Heat/
Cool system for correct operation . If the system operates
correctly, replace the thermostat .
Thermostat Setting &
Thermostat Thermometer
Disagree
1 . Thermostat thermometer setting
requires adjustment .
The thermometer can be ad/- 4 degrees . See
Temperature Display Adjustment in the Configuration
Menu section .
Heat Pump (Air Conditioner)
Cycles Too Fast or Too Slow
(narrow or wide
temperature swing)
1 . 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
so there is no increase in energy use . If you would like
an increased cycle time, choose
SL for slow cycle in the
Configuration menu, step 7 (heat) or 8 (cool) . If an ac-
ceptable cycle rate is not achieved, contact a local HVAC
service person for additional suggestions .
Forgot Keypad
Lockout Code
Press the menu button (button will disappear) and hold in
for 20 seconds . This unlocks the thermostat .
replace the wires and batteries . If the thermostat has been reset and
still does not function correctly contact your heating/cooling service
person or place of purchase .
Note: Be sure to review the installer configuration menu settings .
To reset the programming, clock and configuration settings, press
and
and the SYSTEM
button simultaneously . The thermostat
should go blank and then all segments will be displayed momentarily .
