Emerson 1HDEZ-1521 Symptom Possible Cause Correction Action No Cool, Heat, Cool or Fan, Displayed

Troubleshooting

Symptom	Possible Cause	Correction Action
No Cool	1. Cooling system
	requires service.
Heat, Cool or Fan	1. Possible short in	Check each wire connection
Runs Constantly	wiring.	to verify they are not shorted
	2. Possible short in	or touching together. No
	thermostat.	bare wire should stick out
	3. Possible short in heat/	from under terminal block.
	cool/fan system.	Try resetting the thermostat
	4. FAN Switch set to Fan	as described above. If the
	ON.	condition persists, the
		manufacturer of your system
		can instruct you on how to
		test the Heat/Cool system
		for correct operation. If the
		system operates correctly,
		replace the thermostat.
Displayed	1. Thermostat display	The display can be adjusted
Thermostat	setting	+/- 5 degrees. Adjust the
Reading and	requires adjustment.	Temperature Display Adjust
Thermometer		settings within Thermostat
Disagree		Settings (see Main Menu
		options).
Furnace (Air	1. The location of the	Adjust the Heat Cycle Rate
Conditioner)	thermostat and/or	or Cool Cycle Rate in the
Cycles Too Fast	the size of the Heat-	Advanced Installer Menu.
or Too Slow	ing System may be
(narrow or wide	influencing the cycle
temperature	rate.
swing)
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TROUBLESHOOTING