To Next PageTo Next PageWhat to do if my Robertshaw RS4220 shows HI or LO but the room temperature is normal?
If your Robertshaw Thermostat displays HI or LO while the room temperature is normal, it is recommended to call a licensed service person to replace the thermostat.
Why does my Robertshaw RS4220 Thermostat system turn on too often?
If your Robertshaw Thermostat system turns on too often, increase the temperature differential. Refer to the Pop-Up Wizard section for guidance.
How to fix Robertshaw Thermostat not displaying proper room temperature?
If your Robertshaw Thermostat is not displaying the correct room temperature, check the F/C (Fahrenheit/Celsius) setting. Please refer to the Pop-Up Wizard section for instructions.
General| Type | Non-Programmable |
|---|---|
| Temperature Range | 45°F to 90°F (7°C to 32°C) |
| Display | Digital |
| Compatibility | Single-stage heating and cooling systems |
| Stages | 1 Heat/1 Cool |
| Voltage | 24V AC |
| Power Source | 24 VAC |
| Accuracy | ±1°F (±0.5°C) |
