White Rodgers 1F85-277 installation instructions Troubleshooting

			TROUBLESHOOTING
Symptom	Possible Cause	Corrective Action
No Heat (continued)	5. Heating system requires service or	sound. This sound usually indicates the thermostat
	thermostat requires replacement.	is operating properly. If the thermostat does not
	(continued)	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 manufacturer or a service
		person to verify the heating is operating correctly.
No Cool	1. SYSTEM button not pressed to COOL.	Press SYSTEM button to COOL and lower setpoint
		below room temperature.
	2. Loose connection to thermostat or	Verify thermostat and system wires are securely
	system.	attached.
	3. Cooling system requires service or	Same procedure as diagnostic for No Heat condition
	thermostat requires replacement.	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	1. Possible short in wiring.	Check each wire connection to verify they are not
Runs Constantly	2. Possible short in thermostat.	shorted or touching together. No bare wire should
	3. Possible short in heat/cool/fan	stick out from under terminal screws. Try resetting
	system.	the thermostat as described above. If the condition
	4. FAN Switch set to Fan On.	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	1. The location of the thermostat and/or	Digital thermostats normally provide precise tem-
(Air Conditioner)	the size of the Heating System may	perature control and may cycle faster than some
Cycles Too Fast	be influencing the cycle rate.	older mechanical models. A faster cycle rate means
or Too Slow (narrow or		the unit turns on and off more frequently but runs for
wide temperature swing)		a shorter time so there is no increase in energy use.
		If you would like to increase the cycle time, choose
		SL for slow cycle in the menu, step 4. If an accept-
		able cycle rate is not achieved as received or by
		choosing slow cycle, contact a local service person
		for additional suggestions.
Thermostat Setting &	1. Thermostat thermometer setting	The thermometer can be adjusted +/- 4 degrees.
Thermostat Thermometer	requires adjustment.	See Temperature Display Adjustment in the Configu-
Disagree		ration Menu section.
Blank Display and/or	1. Voltage spike or static discharge.	Use the Reset Operation at top of previous page.
Keypad Not Responding
Heat Setpoint will	1. The desired setpoint conflicts with the	Change system mode to COOL. Raise the Cool
not Respond to the	setpoint of the COOL mode.	setpoint. Return to HEAT mode and set desired
Temperature Up Key		temperature.
Cool Setpoint will	1. The desired setpoint conflicts with the	Change system mode to HEAT. Lower the Heat
not Respond to the	setpoint of the HEAT mode.	setpoint. Return to COOL mode and set desired
Temperature Down Key		temperature.
Forgot Keypad		CAUTION: This resets the thermostat to factory
Lockout Code		default settings of the configuration menu. After
		performing this reset, the thermostat will require
		configuration again. Be sure that you know the
		required configuration settings before resetting.
		With the thermostat in any mode, press		and	at
		the same time to enter the configuration menu at the
		point where the lockout code is to be entered. Press

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