Lennox Unit controller Error Code 76

• If measurement is below specified range ( <5 % RH) the system will ignore the Relative Humidity readings. If measurement is above the specified range( >100% RH) the system will limit the value to 100%. • If measurement of Relative Humidity Sensor is below specified range while the dehumidification mode using RH sensor is enabled, the system will set an alarm. The system will clear the alarm if Relative Humidity sensor measurement is detected in specified operating range OR dehumidification mode using RH sensor is disabled. • Check sensor and wiring.