Emerson 1F82-261 Troubleshooting, Symptom Possible Cause Corrective Action, Reset Operation

TROUBLESHOOTING

Reset Operation

If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation, reset the thermostat by

pressing the reset switch (see Fig 1). If the thermostat has power, has been reset and still does not function correctly contact your heating/cooling service person or place of pur- chase.

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.	System Switch not set to Heat.	Set System Switch to Heat and raise setpoint
			above room temperature.
	2.	Loose connection to thermostat or system.	Verify thermostat and system wires are securely
			attached.
	3.	Heating System requires service or	Diagnostic: Set System Switch to Heat and raise
		thermostat requires replacement.	the setpoint above room temperature. Within a five
			minutes 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 system 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 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 7).
Heat, Cool or Fan Runs Constantly.	1.	Possible short in wiring.	Check each wire connection to verify they are
	2.	Possible short in thermostat.	not shorted or touching together. No bare wire
	3.	Possible short in Heat/Cool/Fan system.	should stick out from under terminal screws. Try
	4.	Fan Switch set to Fan On.	resetting the thermostat as described below.
			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 8 of the Configuration Menu. No other
			adjustment is possible.
Clock Loses or Gains Time	1.	Loss of power to thermostat.	The thermostat will maintain its program in memory
			even with no power 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 5).
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.	Voltage Spike or Static Discharge.	If a voltage spike or static discharge occurs use the
Responding			Reset Operation listed above.