Navien NPE-A / NPE-S Code E060
Dual venturi fault. A fault in the dual venturi, the assembly that meters the air and gas mixture going to the burner. Navien's instruction is to contact technical support; there is no owner-side check.
Call a proThe verdict
Call a licensed plumber
Air-gas mixing hardware. This is the expensive end of the Navien list — nothing about it has a homeowner version.
Typical cost: $200–$1,100
US estimate for parts and labor. Prices vary by region and by who does the work — see how we estimate costs.
What the manual says
The meaning above is transcribed from the manufacturer's diagnostic documentation for the NPE-A / NPE-S — not averaged across the brand.
Source: Navien NPE Operation Manual (NPE-A / NPE-S) (p. 16), read Aug 2026 — the manufacturer's own documentation for this exact series.
What you can safely check
Before anything else: if you smell gas, stop here, leave, and call your gas utility.
- If you smell gas, leave the building and call your gas utility from outside.
- Book a licensed professional.
Code E060 on other Navien series
Other Navien series report code E060 under the same fault name, but each manual is transcribed separately and they do not read alike: