Robertshaw 9420 - Manual (Page 10)

10
WIRING
OPENING
Reset Switch
◆ Reset
To reset the thermostat press the RESET button located just below the
lower left corner of the display.
Step 5: Troubleshooting
Symptom Remedy
Display shows CHECK Monitors system status. Call your
local HVAC service provider.
Check F/C (Fahrenheit/Celsius)
setting. See Changing Fahrenheit
(F) to Celsius (C). Thermostat does not display
proper room temperature.
Thermostat turns system on and
off too frequently.
Thermostat does not turn on system. Check wiring (see Installation
section).
Increase temperature differential
(see Changing the Temperature
Differential section).
If problems with thermostat cannot be resolved, call:
Technical Support: (800) 445-8299
Monday-Friday 7:30 AM - 5:30 PM CST