White Rodgers 1F95-391 Troubleshooting, Symptom, Possible Cause, Corrective Action, No Heat

TROUBLESHOOTING
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 button not pressed to display Heat.	Set SYSTEM button until HEAT is displayed and
			raise temperature above room temperature.
	3.	Loose connection to thermostat or system.	Verify thermostat and system wires are securely
			attached.
	4.	Furnace Lock-Out Condition. Heat may also	Many furnaces have safety devices that shut
		be intermittent.	down 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	Diagonistic: Set SYSTEM button until HEAT is
			displayed and raise 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 on the previous page. If the
			thermostat does not click after being reset contact
			your heating and cooling service person or place
			of purchase for replacement. If the thermostat
			clicks, contact the furnace manufacturer or a service
			person to verify the heating is operation correctly.
No Cool	1.	System button not pressed to display Cool.	Set SYSTEM button until COOL is displayed and
			raise temperature below room temperature.
	2. Loose connection to thermostat or system.		Verify thermostat and system wires are securely
			attached.
	3.	Cooling system requires service or	Same procedure as diagnostic for No Heat
		thermostat requires replacement.	condition except press the SYSTEM button until
			COOL is displayed and lower the setpoint below
			room temperature.There may be up to a five minute
			delay before the thermostat clicks in Cooling.
Heat, Cool or Fan Runs Constantly.	1.	Possible short in wiring.	Check each wire connection to verify they are not
	2.	Possible short in thermostat.	shorted or touching together. No bare wire should
	3.	Possible short in Heat/Cool/Fan system.	out from under terminal screws. Try resetting the
	4.	Fan button pressed to display FAN ON.	thermostat as described on the previous page. 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	Digital thermostats normally provide precise
(narrow or wide temperature swing)		of the Heating System equipment may be	temperature control and may cycle faster than
		influencing the cycle rate.	some older mechanical models. A faster cycle
			rate means the unit turns on on off more frequently
			but runs for a shorter time so there is no increase
			in energy use. If you would like to increase the
			cycle time, refer to page 6 under Installer Table for
			settings. If an acceptable cycle rate is not acheived
			by the adjustment in the Installer Table then you
			may want to contact a local heating and air
			conditioning service person for further 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 can influence the	adjusted. Contact a local service person for
		rate.	suggestions.

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