Tag: overheat-lockout

All the articles with the tag "overheat-lockout".

• Navien NPE-A 016 — Overheat Lockout Fix

  21 May, 2026

  Code 016 (also displayed as E016) on a Navien NPE-A or NPE-S tankless water heater means the unit's heat exchanger outlet temperature exceeded the overheat...