Noritz NRCP Eco TOUGH Code Er41
Fan speed error. The fan is not running at the speed the board expects. Noritz's remedy on this generation is a single line — contact technical support — with none of the exhaust and condensate checks the first-generation manual gives for the same number. Auto reset.
Also displayed as: 41, E41
Call a proThe verdict
Call a licensed plumber
Noritz gives no homeowner remedy at all here, which is unusual for a fan code and is a change from the earlier manual. It is still worth checking the exhaust terminal outside before you call, because it costs nothing — but the documented answer for this generation is a technician.
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 exhaust terminal outside is clear — free, and worth ruling out before the visit.
- Listen for whether the fan spins up at all when the unit tries to start.
- Call a licensed professional or Noritz technical support. This manual lists no other remedy.
Code Er41 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:
Don't confuse this with
One other Noritz NRCP Eco TOUGH code points at a fan too. They are different components in different places, and ordering a part against the wrong one is the most common way this fault gets expensive: