Noritz Error 12 — Flame Failure During Heating Cycle

What Causes Noritz Error 12?

The unit ignited but flame extinguished during operation. Causes: unstable gas pressure, dirty burner, failing gas valve, or defective flame sensor.

How to Fix Noritz Error 12

Repeated code 12 usually requires gas valve or flame sensor replacement. Call us for prompt Noritz repair in Los Angeles.

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 Noritz and provide repair service throughout Los Angeles, the San Fernando Valley, Westside LA, and Ventura County.