What This Error Means
May indicate a condition related to the outdoor unit heat exchanger temperature sensor
Safe Check Steps
The following steps are for general guidance only. Do not touch electrical panels, gas lines, outdoor units, compressors, or electronic boards. Call authorized technical service for any repair.
- 1Turn off the unit and wait 10 minutes before restarting.
- 2If the error code reappears, do not attempt any repairs.
When to Call Service
If the problem persists after trying the safe check steps, contact authorized technical service.
Call Authorized ServiceFrequently Asked Questions
Lennox E4 arıza kodu ne demek?
E4 kodu, dış ünite eşanjör sıcaklık sensörüyle ilişkili bir durumu gösterebilir. Dış ünite bileşenlerine kendiniz müdahale etmeyiniz; yetkili teknik servis desteği alınız.