Noritz Error 14 — Thermal Fuse Blown

What Causes Noritz Error 14?

The thermal safety fuse has blown due to overheating. This is almost always caused by scale buildup in the heat exchanger — a common problem in LA's hard water.

How to Fix Noritz Error 14

Requires thermal fuse replacement AND heat exchanger descaling. Do not bypass the thermal fuse — it is a critical safety component.

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.