Navien Error Codes
19 Navien codes. Jump to your appliance:
Navien Tankless Water Heater Codes19
- E003 E003 — Ignition Failure
- E003C E003C — Cascade Ignition Failure
- E012 E012 — False Flame / Flame Loss
- E016 E016 — Overheat / High-Limit Trip
- E027 Tankless E027 — Sensor Abnormality
- E030 E030 — Abnormal Exhaust Temperature (Flue Overheat)
- E046 E046 — Abnormality in Limit Control (Heat-Exchanger High-Limit)
- E109 E109 — Fan Motor Abnormal Operation
- E110 E110 — Exhaust Blockage / APS Fault
- E193 E193 — Condensate Drain Blockage
- E351 E351 — Water Flow Sensor Fault
- E406 E406 — Heat Exchanger Scale / Lime Buildup
- E432 E432 — Outlet Thermistor Fault
- E438 E438 — Abnormal Circulation Pump Operation
- E515 E515 — PCB / Control Board Abnormal
- E594 E594 — Gas Valve / Modulation Fault
- E615 E615 — Abnormal Input/Memory (MCU Internal Fault)
- E760 E760 — Water Leak Detected
- E777 E777 — Dip Switch Setting Error