Navien E060: Dual Venturi Limit Switch Error

E060 shows up and, unlike some Navien codes, there isn't a reliable homeowner checklist that clears it — this one names a specific internal switch on the NPE series' combustion air-intake assembly rather than a supply-side problem you can fix from outside the unit.

Applies to: Navien NPE series condensing tankless water heaters

What it means

Dual Venturi Limit Switch Error — a fault in the dual venturi/air-intake limit switch assembly used on NPE models. This component isn't something owner's manuals typically walk homeowners through testing, which is why the safe-to-check list below is short compared to most other codes on this page.

Most common causes

Failed limit switch
Wiring fault to the switch
Blockage in the venturi/air intake assembly

What you can safely check yourself

No reliable homeowner fix — at most, confirm the intake and exhaust vents are unobstructed

When to call a professional

Essentially always — this is an internal component fault that needs professional diagnosis and likely part replacement.

Gas supply lines, gas control valves, and venting should only be worked on by a licensed plumber or HVAC technician. Mains/line-voltage electrical work should be done with the breaker off and, beyond a simple reset, by a qualified electrician or plumber.

What the fix costs

There's no separate published parts price for the venturi limit switch itself, but a diagnostic visit for an internal component fault like this one generally falls in the standard $150–$600 range reported for water heater service calls (Angi, Fixr), with the switch and any related labor priced by the technician once the specific part is confirmed. See the water heater repair cost guide for typical repair-cost ranges across common water heater fixes.

Related codes

All Navien codes

Every Navien water heater fault code — the full list on one page.

Safety. This code involves hardware tied to safe combustion venting, and there's no verified homeowner test for it. Repeatedly resetting the unit instead of having the switch and its wiring professionally inspected risks masking a real venting fault rather than fixing one.

Sources

Navien NPE owner's manual and error code troubleshooting guide (manufacturer documentation)

This site is an independent reference, not a substitute for a licensed plumber or electrician. Gas water heaters can leak carbon monoxide, leak gas, or catch fire if serviced incorrectly. Anything involving the gas line, gas control valve, venting, or main electrical wiring should be handled by a licensed professional. Pages are written with AI assistance from the sources listed on each page and checked against them before publishing.