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)

 

 

 

 

29

TROUBLESHOOTING

Page 29
Image 29
Emerson 1HDEZ-1521 Symptom Possible Cause Correction Action No Cool, Heat, Cool or Fan, Runs Constantly, Displayed, Swing