White Rodgers 1F89EZ-0251 installation instructions Troubleshooting, Reset Operation

Troubleshooting

Reset Operation

If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation, you may need to reset the thermostat. To reset, the System Switch must be in Cool,

HEAT, or EMER. Simultaneously hold the and buttons

for approximately 10 seconds until the display goes blank. 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	1. Blown fuse or tripped circuit breaker.	Replace fuse or reset breaker.
(common problems)	2. Furnace power switch to OFF.	Turn switch to ON.
	3. Furnace blower compartment door or	Replace door panel in proper position to engage safety
	panel loose or not properly installed.	interlock or door switch.
No Heat	1. System Switch not set to Heat.	Set System Switch to Heat and raise setpoint above room
		temperature.
	2. Loose connection to thermostat or	Verify thermostat and system wires are securely attached.
	system
	3. Heating System requires service or	Diagnostic: Set System Switch to Heat and raise the
	thermostat requires replacement.	setpoint above room temperature. Within a five minutes
		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 or place of
		purchase for a replacement. If the thermostat clicks, con-
		tact the furnace manufacturer or a service person to verify
		the heating system is operating correctly.
No Cool	1. System Switch not set to Cool.	Set System Switch to Cool and lower setpoint below room
		temperature.
	2. Loose connection to thermostat or	Verify thermostat and system wires are securely attached.
	system.	Same procedure as diagnostic for No Heat condition
	3. Cooling System requires service or	except set the thermostat to Cool and lower the setpoint
	thermostat requires replacement	below the room temperature. There may be up to a five
		minute delay before the thermostat clicks in Cooling if the
		compressor lock-out option is selected in the configuration
		menu.
Heat, Cool or Fan Runs	1. Possible short in wiring.	Check each wire connection to verify they are not shorted
Constantly	2. Possible short in thermostat.	or touching together. No bare wire should stick out from
	3. Possible short in Heat/Cool/Fan	under terminal screws. Try resetting the thermostat as
	system.	described below. If the condition persists, the manufacturer
	4. Fan Switch set to Fan On.	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	1. The location of the thermostat and/or	The cycle rate adjustment can be found in the configuration
or Too Slow (narrow or	the size of the Heating System may be	menu. If an acceptable cycle rate is not achieved using the
wide temperature swing)	influencing the cycle rate.	FA (Fast) or SL (Slow) adjustment contact a local service
		person for additional suggestions.
Cooling Cycles Too Fast	1. The location of the thermostat and/or	The cycle rate for cooling is fixed and can not be adjusted.
or Too Slow (narrow	the size of the Cooling System may	Contact a local service person for suggestions.
or wide temperature	be influencing the cycle rate.
swing)
Thermostat Setting and	1. Thermostat thermometer setting	The thermometer can be adjusted +/- 4 degrees as listed
Thermometer Disagree	requires adjustment.	in the Configuration Menu. No other adjustment is possible.
Blank Display and/or	1. Voltage Spike or Static Discharge.	If a voltage spike or static discharge occurs use the Reset
Keypad Not Responding		Operation listed above.

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