Reset; Step 5: Troubleshooting - Robertshaw 9420 User Manual

Reset

To reset the thermostat press the RESET button located just below the
lower left corner of the display.

Step 5: Troubleshooting

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