Navien E060 Error Code

What does Navien E060 mean?

E060 flags an abnormal condition in the dual venturi limit switch — the component that controls air and gas mixing ratio at each firing stage. The PCB monitors the dual venturi's position feedback; when the switch signal is missing or out of expected range during a firing sequence, the unit shuts down and locks out. This code is specific to Navien condensing models that use a dual venturi gas valve design.

Symptoms

• Unit locks out with E060 before or during a heating cycle.
• No hot water; burner does not fire or fires briefly then shuts off.
• Error persists through multiple reset attempts.
• Unit may run in single-venturi mode briefly before tripping.

Common causes

• Loose or damaged wiring harness connector at the dual venturi.
• Dual venturi actuator mechanically stuck or binding.
• Dual venturi limit switch has failed and no longer sends position feedback.
• PCB communication fault preventing proper dual venturi control.
• Gas orifice obstructed causing abnormal flow resistance.

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Diagnostic steps

1. Power down and inspect the dual venturi connector

   Turn off the unit and gas supply. Open the service panel and locate the dual venturi assembly. Disconnect and reconnect the wiring harness connector, checking for corrosion on the pins, bent terminals, or loose locking tabs.

2. Run the dual venturi test mode

   Navien service menus include a dual venturi test routine accessible via the front panel. Activate the test and observe whether the venturi opens and closes through its full travel. Continuous cycling without settling indicates a failed actuator or limit switch.

3. Inspect wiring along the full harness run

   Trace the wiring from the PCB to the dual venturi, checking for chafing against sheet metal edges, heat damage near the burner, or broken conductors. Repair any damaged sections.

4. Check gas orifice for obstruction

   With gas supply isolated, inspect the venturi gas orifice for debris or insect intrusion. Clear any obstruction with compressed air — do not use wire probes that could enlarge the orifice.

5. Replace dual venturi if actuator test fails

   If the test mode confirms the venturi does not move or does not stop at the correct position, replace the dual venturi assembly using the OEM replacement for your model. If the venturi tests good, suspect the PCB and contact Navien support.

When to call a professional

Dual venturi replacement involves working at the gas valve and combustion assembly. Incorrect installation can create a gas-air ratio fault that causes incomplete combustion or carbon monoxide production. A licensed technician should perform this repair, verify combustion after reassembly using an analyzer, and confirm CO levels at the exhaust before returning the unit to service.