Warning: 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.
How to Reset Navien Code E030
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 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.
This 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.