To Next PageTo Next PageWhy is my Robertshaw Thermostat fan not working?
If your Robertshaw Thermostat system fan isn't working as expected, try adjusting the Electric/Gas switch to match your system type. Refer to the Installation section for guidance.
How to troubleshoot Robertshaw 8400 Thermostat that does not turn on?
If your Robertshaw Thermostat doesn't turn on the system, check the wiring. Refer to the Installation section for instructions.
What to do if my Robertshaw Thermostat display is blank?
If the display on your Robertshaw Thermostat is blank, flashing, or constantly showing 'LOW BATT,' the suggested solution is to replace the batteries.
Why does my Robertshaw Thermostat 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. Consult the section on Changing the Temperature Differential for instructions.
General| Brand | Robertshaw |
|---|---|
| Model | 8400 |
| Category | Thermostat |
| Language | English |
Lists the key features of the Robertshaw 8400 thermostat, including display, protection, and connectivity.
Provides instructions for safely disposing of old thermostats containing mercury.
Important considerations for mounting and wiring the thermostat, including placement and wire stripping.
Illustrates wiring for single transformer systems: Heat/Cool, Heat Only, Cool Only.
Details the function and requirements for each terminal connection on the thermostat.
Guides through testing the cooling, heating, and fan functions of the thermostat.
Configures system modes (Heat/Cool/Off) and fan operation (Auto/On).
Adjusts the temperature range for system cycling to prevent short cycling.
Switches temperature units (F/C) and sets the filter replacement reminder.
Procedure for clearing the 'CHECK FILTER' message and resetting the filter timer.
Details activating the backlight and performing a factory reset.
Provides solutions for common thermostat problems like no system power or frequent cycling.
Advises on replacing batteries annually to prevent issues and ensure proper operation.
Outlines the terms and conditions of the Robertshaw thermostat's limited warranty coverage.
