Troubleshooting - Robertshaw RS4220C Installation Manual

Troubleshooting

Problem
Thermostat does not turn on
system.
System turns on too often.
System fan does not operate
properly.
Thermostat does not display
proper room temperature.
Display shows HI or LO and room
temperature is normal.
If problems with thermostat cannot be resolved, contact:
www.robertshawclimate.com
Technical Support: (844) 362-4822
Monday-Friday 7:30 AM - 5:30 PM CST
Check wiring
(see Wiring Diagrams section).
Increase temperature differential
(see Pop-Up Wizard section).
Move fan option switch to either
gas or electric, to match system
(see System Switch Selection
section).
Check F/C (Fahrenheit/Celsius)
setting (see Pop-Up Wizard
section).
Call a licensed service person to
replace thermostat.
or
15
Action