White Rodgers 875 specifications St. Louis, Missouri Markham, Ontario

TROUBLESHOOTING

Symptom	Possible Cause		Corrective Action
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 system.	Verify thermostat and system wires are securely
			attached.
	3. Cooling System requires service or thermostat		Same procedure as diagnostic for No Heat
		requires replacement.	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 if the compressor
			lock-out option is selected in the configuration
			menu (Item 6).
Heat, Cool or Fan Runs Constantly.	1.	FAN Switch set to Fan ON.	Check each wire connection to verify they are
	2.	Possible short in wiring.	not shorted or touching together. No bare wire
	3.	Possible short in thermostat.	should stick out from under terminal screws.
	4.	Possible short in Heat/Cool/Fan system.	Try resetting the thermostat. 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	1.	The location of the thermostat and/or the size	Item 2 in the Configuration Menu is the adjustment
(narrow or wide temperature swing)		of the Heating System may be influencing the	that controls the cycle rate. If an acceptable cycle
		cycle rate.	rate is not achieved using the FA (Fast) or SL
			(Slow) adjustment contact a local service person
			for additional suggestions.
Cooling Cycles Too Fast or Too Slow	1.	The location of the thermostat and/or the size	The cycle rate for cooling is fixed and can not be
(narrow or wide temperature swing)		of the Cooling System may be influencing the	adjusted. Contact a local service person for
		cycle rate.	suggestions.
Thermostat Setting and Thermometer	1.	Thermostat thermometer setting requires	The thermometer can be adjusted +/- 4 degrees as
Disagree		adjustment.	listed in item 7 of the Configuration Menu. No other
			adjustment is possible.
Clock Loses or Gains Time	1.	Loss of power to thermostat and low batteries.	The thermostat will maintain its program in memory
			even with no power/no batteries 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 Configuration Menu (Item 4).
Thermostat Does Not Follow Program	1.	AM or PM set incorrectly in program.	Check current clock and program settings including
	2.	AM or PM set incorrectly on the clock.	the AM or PM designations for each time period.
	3.	Voltage spike or static discharge.	If a voltage spike or static discharge occurs use the
			Reset Operation listed above.
Blank Display and/or Keypad Not	1.	Loss of power and dead batteries.	Replace batteries and check heat/cool system for
Responding	2.	Voltage Spike or Static Discharge.	proper operation. If a voltage spike or static
			discharge occurs use the Reset Operation
			listed above.

White-Rodgers is a division of Emerson Electric Co.

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HOMEOWNER HELP LINE: 1-800-284-2925

St. Louis, Missouri Markham, Ontario

www.white-rodgers.com