White Rodgers Troubleshooting Tips for 1F83-277 and Similar Models

TROUBLESHOOTING

Reset Operation

If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation, you can reset the thermostat by removing the wires from terminals R and C and removing batteries for 2 minutes. After resetting the thermo- stat, replace the wires and batteries. If the thermostat 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
	panel loose or not properly installed.	safety interlock or door switch.
No Heat	1. Pilot light not lit.	Re-light pilot.
	2. System Switch not set to HEAT.	Set System Switch to HEAT and raise setpoint
		above room temperature.
	3. Loose connection to thermostat or	Verify thermostat and system wires are securely
	system.	attached.
	4. Furnace Lock-Out Condition. Heat	Many furnaces have safety devices that shut down
	may also be intermittent.	when a lock-out condition occurs. If the heat works
		intermittently contact the furnace manufacturer or
		local service person for assistance.
	5. Heating system requires service or	Diagnostic: Set System Switch to HEAT and raise
	thermostat requires replacement.	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 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 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
	system.	attached.
	3. Cooling system requires service or	Same procedure as diagnostic for No Heat condi-
	thermostat requires replacement.	tion 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
(Air Conditioner)	the size of the Heating System may	temperature control and may cycle faster than
Cycles Too Fast	be influencing the cycle rate.	some older mechanical models. A faster cycle rate
or Too Slow (narrow or		means the unit turns on and off more frequently but
wide temperature swing)		runs for 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 acceptable cycle rate is not achieved as
		received or by choosing slow cycle, contact a local
		service person for additional suggestions.

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