Noritz tankless water heater code Er41
Your series decides which reading applies. Across the 2 Noritz series documented here, code Er41 is listed as fan speed fault or exhaust blockage (1 series) and fan speed error (1 series). Find your series in the table below, where those readings route to a professional.
What code Er41 means on each Noritz series
| Series | What it means | Verdict | Typical cost |
|---|---|---|---|
| NRCP | Fan speed fault or exhaust blockage | Call a pro | $0–$900 |
| NRCP Eco TOUGH | Fan speed error | Call a pro | $0–$900 |
Each row opens the full page for that generation. We hold manuals for NRCP and NRCP Eco TOUGH, and each one gets its own reading of code Er41 — what Noritz documents, what you can safely check yourself, and what the repair should cost.
What each manual actually says
The table above compares 2 series in four columns, which is enough to route you and not enough to explain anything. This is the Noritz wording behind each row, one entry per manual, so you can see where the 2 readings of code Er41 agree and where they part company.
NRCP — 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.
NRCP Eco TOUGH — 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.
Does it matter which Noritz you have?
NRCP and NRCP Eco TOUGH all route code Er41 the same way: a professional, at $0–$900. That makes it one of the Noritz numbers you can act on before working out which unit you own.
Which Noritz do you have?
On the 2 series that report code Er41, the model number on the rating label starts NRCP — match yours against the 4 listed below. You can also use the full model-number decoder.
Where this comes from
Source: Noritz Service Manual — NRCP111-DV / NRCP98-DV (Rev. 09/19) (p. 62), read Sep 2026 — the manufacturer's own documentation for this Noritz range.
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 Noritz range.
Parts, guides and symptoms behind code Er41
Code Er41 on these 2 Noritz series points at 2 parts and 3 symptoms, each named by the manufacturer's own procedure for this code.