Navien E012 — Flame Loss During Operation

What Causes Navien E012?

The flame ignited but extinguished during the heating cycle. Causes include gas pressure fluctuation, a dirty burner assembly, or a failing gas valve.

How to Fix Navien E012

Check gas supply. If other appliances work normally, the issue is internal — call us for diagnosis. Common during high-demand periods when SoCal Gas pressure fluctuates.

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.