Noritz tankless water heater code Er44
Your series decides which reading applies. Across the 2 Noritz series documented here, code Er44 is listed as possible pump failure (1 series) and recirculation abnormality (1 series). Find your series in the table below, where those readings route to a replacement part and clear it yourself.
What code Er44 means on each Noritz series
| Series | What it means | Verdict | Typical cost |
|---|---|---|---|
| NRCP | Possible pump failure | Part replacement | $200–$900 |
| NRCP Eco TOUGH | Recirculation abnormality | DIY fix | $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 Er44 — 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 Er44 agree and where they part company.
NRCP — Possible pump failure
Noritz's description for this code on this generation is exactly that — possible pump failure — with a one-line remedy: check pump. This is the recirculation pump built into the cabinet. The second generation renames the same number to "recirculation abnormality" and gives it three remedies instead of one, so a page written for an NRCP1112 or NRCP982 is describing a broader fault than this.
NRCP Eco TOUGH — Recirculation abnormality
The recirculation circuit is not working as it should. On this generation Noritz gives the code three remedies — check the return line filter, check the recirculation setting for External or Internal mode, and check the pump operation — and calls it recirculation abnormality. The first generation numbers the same fault the same way but calls it "possible pump failure" with one remedy, and carries a separate Er46 for low recirculation flow that does not exist here. Manual reset.
How much the answer changes between series
This is the part that catches people out. Code Er44 does not lead to the same job on every Noritz series: a replacement part and clear it yourself are both documented answers to this number, depending on the generation. Buying a part because a page for a different series said so is how this fault gets expensive.
The cost is documented the same way across all 2 series: $0–$900, depending on which of the manufacturer's causes turns out to be yours.
Which Noritz do you have?
On the 2 series that report code Er44, 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 Er44
Code Er44 on these 2 Noritz series points at 1 guide, 2 parts and 3 symptoms, each named by the manufacturer's own procedure for this code.