Navien E030 — Exhaust Thermistor Fault

What Causes Navien E030?

The exhaust temperature sensor is reading outside its normal range, indicating either a sensor failure or actual overheating conditions.

How to Fix Navien E030

This is a component failure requiring professional diagnosis. We carry Navien exhaust thermistors and can typically complete this repair .

When to Call a Professional

Call Simple Water Heater & Filtration if:

• The error code returns after resetting
• You are not comfortable working with gas appliances
• The unit is making unusual sounds alongside the error
• This is the second time you have seen this code in the past year

We are factory-trained on Navien and provide repair service throughout Los Angeles, the San Fernando Valley, Westside LA, and Ventura County.