Navien Error Code E441: Dom.Hot Water Outlet2 Sensor
How to Fix Navien Code E441
- Step 1: Power cycle the unit by turning off the power switch for 30 seconds, then turn it back on. This may reset the system and clear a temporary error.
- Step 2: Check the sensor wires that are visible without opening the unit. Look for any obvious damage or loose connections.
- Step 3: If the error persists after power cycling, contact a qualified HVAC technician to diagnose and repair the issue.
How to Reset Navien Code E441
- Turn off the unit using the power button on the front panel.
- Turn off the gas supply valve.
- Turn off the circuit breaker supplying power to the unit. Wait 30 seconds.
- Restore power at the breaker, then open the gas valve.
- Turn the unit back on. If the error returns, the underlying issue needs repair.
What does E441 mean?
The E441 error code on your Navien tankless water heater indicates a problem with the DHW Outlet 2 sensor. This sensor monitors the temperature of the hot water as it leaves the unit. The Navien control board uses this temperature reading to regulate the burner and maintain a consistent hot water temperature. If the control board receives an unusual or no signal from this sensor, it will display the E441 error and shut down the unit to prevent potential overheating or other issues. This shutdown is a safety feature to protect the unit and your plumbing system.
Specifically, this error means the control board is seeing either an open circuit, short circuit, or a reading outside the acceptable range from the DHW Outlet 2 sensor. This could be due to a faulty sensor, wiring issues, or even a problem with the control board itself. Because the unit relies on accurate temperature readings to operate safely and efficiently, it's important to address this issue promptly.
Affected Models
- NCB-H
- NFB-H
- NFC-H
- NHB-H
- NHW-A
- NPE-A2
- NCB
- NCB
- NCB
- NPE
- NPE
- NPE
- NHB
- NHB
- NCB
- NCB
- NPE
- NPE
- NCB
- NCB
- NPE
- NCB
- NPE
- NHB
- NCB
- NPE
- NPE
- NCB
- NCB
- NPE
- NPE
- NPE
- NPE
- NHB
- NHB
- NCB
- NCB
- NPE
- NPE
- NBP
- NPE
- NPE
- NPE
- NFC
- NFC
- NCB
- NPE
- NPE
- NPE
- NCB
- NPE
- NCB
- NPE
- NPE
- NCB
- NPE
- NHB
- NPE-S
- NPN
- NPN
- NCB
- NPE
- NCB
- NPE
- NHB
- NPB
- NFC
- NFC
- NHB
- NPF
- NPF
- NPE
- NHB
Source Documentation
| Manual | Page | Reason | Action |
|---|---|---|---|
| Navien NCB-H Installation & Operation Manual | 129 | Dom.Hot Water Outlet2 Sensor | Contact technical support at 1-800-519-8794. |
| Navien NFC-H Installation & Operation Manual | 127 | Hot water outlet 2: thermistor open or short circuit | Auto RESET |
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| DHW Outlet 2 Temperature Sensor | 30012345A | — |
| Main Control Board | PCB-NR240A | — |
Related Codes on Same Models
| Code | Description | Severity |
|---|---|---|
| E001 | Ignition Failure | Warning |
| E003 | Abnormal Ignition | Warning |
| E004 | False Flame Detection | Warning |
| E012 | Flame Loss | Warning |
| E016 | Overheating | Warning |
| E030 | Exhaust Overheat Sensor | Warning |
| E031 | Inlet Thermistor Open/Short | Warning |
| E046 | Outlet Thermistor Open/Short | Warning |
| E047 | DHW Thermistor Open/Short | Warning |
| E060 | Fan Motor Abnormality | Warning |