Noritz NRCP Code Er61
Fan RPM sensor fault. The sensor reporting fan speed is not working. Noritz's remedy is one line — check the fan motor — because on this appliance the speed sensor is part of the motor assembly. Without it the board cannot confirm the fan is running at the rate combustion needs.
Also displayed as: 61, E61
Call a proThe verdict
Call a licensed plumber
The fan is the combustion air supply, and a board that cannot verify its speed will not let the burner run. Whether the sensor or the whole motor is at fault decides the price, and only a technician can say.
Typical cost: $250–$1,000
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.
- Listen for whether the fan spins up at all when the unit tries to start.
- Mention any recent noise from the fan when you book.
- Call a licensed professional.
Frequently asked questions
How is Er61 different from Er41?
Er41 is the fan not reaching its target speed, and Noritz pairs it with exhaust blockage because an obstructed flue produces exactly that. Er61 is the sensor that reports the speed. One is about the air path, the other about the instrument watching it.
Code Er61 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: