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If problems with thermostat cannot be resolved, call:
Technical Support: (800) 445-8299
Monday-Friday 7:30-5:30 CST
10
Thermostat does not turn
on system.
Check wiring.
(See Installing Model 9520
Thermostat)
Check fuse. Replace with 2 amp
fuse if fuse has opened.
Thermostat turns on and
off too frequently.
Increase temperature differential.
(See Changing Temperature
Differential)
Display is blank, flashing,
or constant LO BAT.
Replace batteries.
System fan does not
operate properly.
Move fan option switch to either
gas or electric, to match system.
(See Installing Model 9520
Thermostat)
Thermostat does not display
proper room temperature.
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.
Troubleshooting
Symptom Remedy