White-rodgers 1F80-0261 User Manual download pdf (Page 9)

TROUBLESHOOTING

Reset Operation

If a voltage spike or static discharge blanks out the display

or causes erratic thermostat operation, reset the thermostat

by pressing the , and TIME buttons simultaneously.

If the thermostat has power, has been reset and still does not

function correctly contact your heating/cooling service person

or place of purchase.

Symptom Possible Cause Corrective Action

No Heat/No Cool/No Fan

(common problems)

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.

Replace fuse or reset breaker.

Turn switch to ON.

Replace door panel in proper position to engage safety

interlock or door switch.

No Heat

1. System Switch not set to Heat.

2. Loose connection to thermostat or

system

3. Heating System requires service or

thermostat requires replacement.

Set System Switch to Heat and raise setpoint above

room temperature.

Verify thermostat and system wires are securely attached.

Diagnostic: Set System Switch to Heat and raise the

setpoint above room temperature. Within a ﬁ ve minutes

the thermostat should make a soft slick 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 or place of purchase for a replacement.

If the thermostat clicks, contact the furnace manufac-

turer or a service person to verify the heating system is

operating correctly.

No Cool

1. System Switch not set to Cool.

2. Loose connection to thermostat or

system.

3. Cooling System requires service or

thermostat requires replacement

Set System Switch to Cool and lower setpoint below

room temperature.

Verify thermostat and system wires are securely attached.

Same procedures as diagnostic for No Heat condi-

tion except set the thermostat to Cool and lower the

setpoint below the room temperature. There may be up

to a ﬁ ve minute delay before the thermostat clicks in

Cooling if the compressor lock-out option is selected in

the conﬁ guration menu (Item 6).

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 screws. Try resetting the

thermostat as described below. If the condition persists,

the manufacturer of your system or service person

can instruct you on how to test the Heat/Cool/ system

for correct operation. If the system operates correctly,

replace the thermostat.

Furnace Cycles Too Fast or Too Slow

Cooling Cycles Too Fast or Too Slow

(narrow or wide temperature swing)

1. The location of the thermostat and/

or the size of the Heating or Cooling

System may be inﬂ uencing the

cycle rate.

Item 4 (CR Heat) or 5 (CR Cool) in the Conﬁ guration

Menu is the adjustment that controls the cycle rate. If

an acceptable cycle rate is not achieved using the FA

(Fast) or SL (Slow) adjustment contact a local service

person for additional suggestions.

Thermostat Setting and

Thermometer Disagree

1. Thermostat thermometer setting

requires adjustment.

The thermometer can be adjusted +/- degrees as listed

in item 8 of the Conﬁ guration Menu. No other adjust-

ment is possible.

Clock Loses or Gains Time

1. Loss of power to thermostat. The thermostat will maintain its program in memory

even with no power but the clock time will be incorrect

when power is restored. See No Heat/No Cool /No Fan

(common problems) above for items to check in the

system.

Heat or Cool Starts Early

1. EMR activated. See Conﬁ guration Menu (Item 3)

Thermostat Does Not Follow

Program

1. AM or PM set incorrectly in program.

2. AM or PM set incorrectly on the clock.

3. Voltage spike or static discharge.

4. See “Heat or Cool Starts Early” above.

Check current clock and program settings including

the AM or PM designations for each time period. If a

voltage spike or static discharge occurs use the Reset

Operation listed above.

Blank Display and/or Keypad Not

Responding

1. Voltage Spike or Static Discharge. If a voltage spike or static discharge occurs use the

Reset Operation listed above.

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White-rodgers 1F80-0261 User Manual Page 9

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