White Rodgers 1C26 installation instructions Troubleshooting

8 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.	Broken or melted anticipator wire.	Excessive current or dead short in system. Have
			a qualified service person check the system
			before replacing thermostat.
	3.	Loose connection to thermostat or system.	Verify thermostat and system wires are securely
			attached.
	4.	Thermostat or heating system requires	Your furnace manufacturer or service person can
		replacement or service.	describe how to test the heating system to verify
			it is operating correctly. If the heating system is
			capable of operation and the no heat condition
			persists, replace the thermostat.
	5.	System Switch not set to Heat.	Set System Switch to Heat and raise temp above
			room temp.
Intermittent Heat	1.	Furnace Lock-Out Condition	Many furnaces have safety devices that shut the
			system down when a lock-out condition occurs. If
			the heat works intermittently contact the furnace
			manufacturer or local service person for assistance.
No Cool	1.	Loose connection to thermostat or system.	Verify thermostat and system wires are securely
			attached.
	2.	Thermostat or cooling system requires	Your cooling system manufacturer or service
		replacement or service.	person can describe how to test the cooling
			system to verify it is operating correctly. If the
			cooling system is capable of operation and the no
			cooling condition persists, replace the thermostat.
	3.	System Switch not set to Cool.	Set System Switch to Cool and lower temp below
			room temp.
Heat, Cool or Fan Runs Constantly.	1.	Possible short in wiring.	Check each wire connection to the thermostat to
	2.	Possible short in thermostat.	verify it is neatly looped under the terminals. No
	3.	Possible short in heat/cool/fan system.	extra wire should stick out from under the
			terminals.
Furnace Cycles Too Fast or Too Slow	See Step 5, Adjusting the Anticipator.		The anticipation setting is the only adjustment that
Narrow or wide temperature swing			effects the heating cycle rate. If an acceptable
			cycle rate is not achieved using the anticipator
			contact a local service person for additional
			suggestions. The location of the thermostat, size
			of the Heat/Cool System and current draw can
			influence the cycle rate.
Cooling Cycles Too Fast or Too Slow	1.	Poor thermostat location for sensing room	The cycle rate for cooling can not be adjusted.
(narrow or wide temperature swing)		temperature.	The location of the thermostat, size of the Cool
	2.	Cooling system over or undersized.	system and current draw can influence the cycle
	3.	Excessive Current draw influencing thermostat.	rate. Contact a local service person for suggestions.
Thermostat Setting and Thermostat	1.	Thermostat thermometer setting requires	The thermometer can be adjusted by using a
Thermometer Disagree		adjustment.	standard slotted screwdriver. Turn the thermom-
	2.	Thermostat setting lever requires calibration.	eter pointer screw located inside the front cover
			to change the setting. For calibrating the setting
			lever contact a local heating and cooling service
			person.
Adjusting Thermometer	1.	Thermostat thermometer disagrees with	The thermometer on the thermostat is accurately
		other room thermometers.	calibrated at our factory but you can adjusted it
			by using a standard slotted screwdriver. Turn the
			thermometer pointer screw located inside the
			front cover to change the setting.
White-Rodgers is a division			The Emerson logo is a
of Emerson Electric Co.		www.white-rodgers.com	trademark and a service mark
			of Emerson Electric Co.