Lennox CS7500 Error Codes

Equipment type not specified

• 10 humidity sensor error: With humidifier or dehumidifier) and conditions are as follows:…
• 11 humidity sensor error: Without humidifier or dehumidifier and the sensor reads out of…
• 12 replace media filter
• 13 replace UV lamp
• 14 replace humidity pad
• 15 routine system check-up
• 16 replace metal insert for pure air
• 17 user editable
• 18 user editable
• 19 Economizer fault: F terminal receives 24VAC and error will be displayed
• 4 high temperature protection: High temperature protection when outdoor ambient temperature…
• 5 temperature sensor error: Local temperature sensor is out of range -40°F to 158°F There…
• 7 memory error: EEPROM error (Power ON)
• 8 memory error: EEPROM error (Operating)
• 9 no external sensor: The outdoor temperature sensor is out of range (-50°F to 180°F)

Reference only. Confirm against the manual for your exact model. Data release 105f66ecb9e96e5dc473025d.