Thermostat display is very dim or hard to read

Steps:

• Adjust brightness: In the thermostat menu or Kasa app, increase display brightness and disable any aggressive power-saving display options.
• Check power: Ensure R and C connections are tight and that the thermostat is not running solely on backup battery.
• Observe behavior: If brightness fluctuates with HVAC operation, there may be a power supply issue that needs a technician.
• Replace thermostat: If brightness remains low despite settings and stable power, the backlight or display module is failing and the thermostat should be replaced.