Noritz NRCP Eco TOUGH Code Er11
Ignition failure. The burner failed to light. As on the first generation, Noritz documents the trigger: during a burning operation, ten consecutive failed ignition attempts produce Er11. The remedies are the main gas supply valve being open and the gas supply and inlet gas being within specification. Noritz lists this as a manual reset — the unit will not clear it on its own.
Also displayed as: 11, E11
Call a proThe verdict
Call a licensed plumber
Check the gas is on, which is free and is Noritz's first remedy. Beyond that it is inlet gas pressure, which needs a manometer. The unit has already tried ten times, so another reset is not new information.
Typical cost: $0–$900
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 NRCP Eco TOUGH — not averaged across the brand.
Source: Noritz Service Manual — NRCP1112-DV / NRCP982-DV Eco TOUGH (Rev. 05/19) (p. 58), read Sep 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.
- Check the main gas supply valve at the heater is fully open, and the meter valve too.
- Try another gas appliance — if nothing gas-fired works, the supply is the problem.
- On propane, check the tank is not empty or frozen down.
- Call a licensed professional rather than continuing to reset it.
Code Er11 on other Noritz series
The same code number can mean something different on another series — make sure you're reading the page for your exact unit: