Noritz NRCP Code Er41
Fan speed fault or exhaust blockage. Noritz names this one twice over — fan speed abnormality, and exhaust blockage — because the fan cannot reach its target speed when the path it is pushing against is obstructed. The remedies are a power cycle, the exhaust pipe free of obstructions, and the condensate trap or pipe not clogged.
Also displayed as: 41, E41
Call a proThe verdict
Call a licensed plumber
Two of the three causes are things you can look at outside for nothing, and on a condensing unit the condensate line is the one people never think of. If both are clear it is the fan or its drive, which is a service call and the expensive end of this code.
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 — not averaged across the brand.
Source: Noritz Service Manual — NRCP111-DV / NRCP98-DV (Rev. 09/19) (p. 62), 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.
- Cut the power for a minute and restore it.
- Check the exhaust terminal outside is completely clear.
- Check the condensate trap and drain line are not clogged or frozen.
- If the fault stays with all three done, call a licensed professional.
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 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: