URGENT - Safety Lockout
Navien Error Code E004
False Flame Detection
Professional Service Required
E004 indicates the flame sensor is detecting flame when the gas valve is not open. This is a safety issue requiring immediate professional attention.
What Does E004 Mean?
Error code E004 indicates that the flame sensor is detecting a flame signal when no gas valve call exists. This "false flame" detection is a safety concern that prevents the boiler from operating.
Common causes include a faulty flame sensor, moisture in the sensor circuit, or issues with the control board. Professional diagnosis is required to identify and resolve the root cause.
Recommended Action
Call a licensed HVAC technician immediately. E004 requires professional diagnosis of the flame sensing system, including sensor inspection, wiring checks, and potential control board testing.
Related Navien Error Codes
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