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Troubleshooting
Symptom
Thermostat does not turn
on system.
Thermostat turns on and
off too frequently.
Display is blank, flashing,
or constant LO BAT.
System fan does not
operate properly.
Thermostat does not display
proper room temperature.
If problems with thermostat cannot be resolved, call:
Technical Support: (800) 445-8299
Monday-Friday 7:30-5:30 CST
Check wiring.
(See Installing Model 9520
Thermostat)
Check fuse. Replace with 2 amp
fuse if fuse has opened.
Increase temperature differential.
(See Changing Temperature
Differential)
Replace batteries.
Move fan option switch to either
gas or electric, to match system.
(See Installing Model 9520
Thermostat)
Check F Fahrenheit/C Celsius
switch located at top center of cir-
cuit board for proper position. If a
new selection is made, press
RESET button located to the right
of the LCD display.
10
Remedy
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