Specifications; Troubleshooting - White Rodgers 1F78 User Manual

SPECIFICATIONS

6
ELECTRICAL DATA
Electrical Rating:
0 to 30 VAC 50/60 Hz. or D.C.
0.05 to 1.0 Amps (Load per terminal)
1.5 Amps Maximum Total Load (All terminals combined)
7

TROUBLESHOOTING

Reset Operation
If a voltage spike or static discharge blanks out the display or
causes erratic thermostat operation you can reset the thermo-
stat by pressing and
the SYSTEM switch from OFF to HEAT. This also resets the
factory defaults. If the thermostat has power, has been reset
Symptom
No Heat/No Cool/No Fan
(common problems)
No Heat
No Cool
at the same time while moving
Possible Cause
1. Blown fuse or tripped circuit breaker.
2. Furnace power switch to OFF.
3. Furnace blower compartment door or
panel loose or not properly installed.
1. Pilot light not lit.
2. SYSTEM Switch not set to HEAT.
3. Loose connection to thermostat or system.
4. Furnace Lock-Out Condition. Heat may also
be intermittent.
5. Heating system requires service or
thermostat requires replacement.
1. SYSTEM Switch not set to Cool.
2. Loose connection to thermostat or system.
3. Cooling system requires service or
thermostat requires replacement.
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THERMAL DATA
Setpoint Temperature Range:
45 F to 90 F (7 C to 32 C)
Operating Ambient Temperature Range:
32 F to 105 F
Operating Humidity Range:
0 to 90% RH (non-condensing)
Shipping Temperature Range:
-40 F to 150 F
and still does not function correctly contact your heating/cooling
service person or place of purchase.
Batteries
For optimum performance, we recommend replacing batteries
once a year with fresh "AAA" Energizer
Corrective Action
Replace fuse or reset breaker.
Turn switch to ON.
Replace door panel in proper position to engage
safety interlock or door switch.
Re-light pilot.
Set SYSTEM Switch to HEAT and raise setpoint
temperature above room temperature.
Verify thermostat and system wires are securely
attached.
Many furnaces have safety devices that shut
down when a lock-out condition occurs. If the
heat works intermittently contact the furnace
manufacturer or local 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 below.
If the thermostat does not click after being reset
contact your heating and cooling service person
or place of purchase for a replacement. If the
thermostat clicks, contact the furnace manufac
turer or a service person to verify the heating is
operating correctly.
Set SYSTEM Switch to COOL and lower setpoint
temperature below room temperature.
Verify thermostat and system wires are securely
attached.
Same procedure 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.
alkaline batteries.
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