How to troubleshoot Robertshaw 9400 Thermostat that does not turn on?
If your Robertshaw Thermostat does not turn on the system, check the wiring. Refer to the Installation section for wiring instructions.
What to do if my Robertshaw 9400 display is blank?
If the display of your Robertshaw Thermostat is blank, flashing, or constantly showing 'LOW BATT,' the suggested solution is to replace the batteries.
Why does my Robertshaw 9400 turn on and off too frequently?
If your Robertshaw Thermostat is turning the system on and off too frequently, the suggested solution is to increase the temperature differential. See the instructions on changing the temperature differential.
What to do if system fan does not operate properly on Robertshaw 9400 Thermostat?
If the system fan is not operating properly with your Robertshaw Thermostat, move the fan option switch to either gas or electric to match your system. Refer to the installation instructions for guidance.
Tests the thermostat's ability to control the cooling system, including the 5-minute compressor delay.
Tests the thermostat's ability to control the heating system and display the flame icon.
Remedies for when the thermostat does not turn on the system.
Troubleshooting blank, flashing displays, or low battery warnings.
General| Display | Digital |
|---|---|
| Backlight | Yes |
| Hold Function | Yes |
| Type | Programmable |
| Power | Battery-powered |
| Compatibility | Conventional systems |
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