E030 🟡 Repair Required
Navien Error Code E030: Exhaust Overheat Sensor
⚠️ Your Navien boiler has detected an overheating exhaust issue and has shut down to prevent damage.
How to Fix Navien Code E030
- Check the exhaust vent for any signs of blockage or restriction. Ensure it is clear and properly connected to the boiler.
- Inspect the exhaust overheat sensor for any visible damage or discoloration. If you suspect it is faulty, it's best to call a professional for replacement.
- If the issue persists, call a licensed HVAC technician to diagnose and repair the problem.
What Does Navien Error Code E030 Mean?
The E030 error on your Navien boiler indicates that the exhaust overheat sensor has detected temperatures exceeding the safe limit. This sensor is designed to protect your boiler from overheating, which can cause damage to the unit and potentially lead to a safety hazard. When this error occurs, your boiler will shut down to prevent any further issues.
Common Causes of Navien Code E030
- Blocked or restricted exhaust venting, preventing proper heat dissipation
- Faulty exhaust overheat sensor
- Incorrect venting material or size
- Overheating due to a separate issue, such as a failed heat exchanger
Applicable Navien Models
Source Documentation
This error code is documented in 6 official Navien technical manuals.
NFB-H Installation & Operation ManualPage 116
ReasonExhaust Overheat
ActionCheck flow, clean system filters.
Navien NCB-H Installation & Operation ManualPage 129
ReasonExhaust Overheat
ActionContact technical support at 1-800-519-8794.
Navien NFB-H Installation & Operation ManualPage 116
ReasonExhaust Overheat
ActionCheck flow, clean system filters.
Navien NFC-H Installation & Operation ManualPage 127
ReasonAbnormal exhaust temperature
ActionManual RESET Alarm
Navien NHB-H Installation & Operation ManualPage 119
ReasonExhaust Overheat
ActionCheck flow, clean system filters.
Navien NPF Installation & Operation ManualPage 125
ReasonAbnormal exhaust gas temperature (Lock Out)
ActionThis error occurs when the overheat controller on the exhaust is initiated due to an abnormal exhaust gas temperature. ● Stop operating the furnace and contact Technical Support at 1-800-519-8794.
Need a Pro to Fix Navien Code E030?
A licensed HVAC technician can diagnose and fix this issue quickly.
Find a Licensed Tech Near You →Replacement Parts for Navien Tankless Water Heater Code E030
Exhaust Overheat Sensor OEM: 800-1000-0000
Exhaust Vent