Aprilaire 8400 Series Thermostat User Guide

About Your New Thermostat All 8400 series thermostats Large, clear, backlit display is easy to read – even in the dark.  Displays room temperature, temperature setting, and optional outdoor temperature.  Front battery door access for fast, easy replacement.  Built-in compressor protection.  Circulation fan mode for air cleaning.  Air filter, humidifier, dehumidifier, and HVAC service indicators.  … Read more