HVACopediaNoritz · Tankless water heater
Error History Error history list
What the display is showing
Shows the eight most recent failures of the unit, with 1 being the newest. Select an error and press OK to see its details. The EZ Start Plus app shows the same history with the days elapsed since each error.
Applies to: EZ111, EZ98, EZ71, NRCR111, NRCR92 (operation panel and RC-7651M-B remote)
What to do
- Press the Menu button.
- Open Maintenance Monitor.
- Select an error and press OK for details.
Settings for these units
Indoor clearances (required and recommended) · Noritz NRCR
| Location | Required | Recommended (service) |
|---|---|---|
| Top | 12 in. (300 mm) | 3 in. (76 mm) above and below exhaust |
| Front | 4 in. (100 mm) | 24 in. (610 mm) |
| Sides | 3 in. (76 mm) | 8 in. (203 mm) |
Required clearances apply to both combustible and non-combustible materials.
Recommended space is for service and quick access to gas and water shut-offs.
Operation panel menu settings and defaults · Noritz EZ, Noritz NRCR
| Setting | Options | Default |
|---|---|---|
| Max Set Temperature (power off) | 100-140 F in 5 F steps; 37-48 C, 50-60 C | 120 F / 50 C |
| Recirc ON/OFF | ON / OFF | OFF |
| Recirc Mode | Always OFF, Always ON, Manual Timer, Auto Learning (NRCR) | Always OFF |
| Vacation Mode | Active / Inactive | Inactive |
| Flow Meter Alarm | 10-60 gal (5 gal steps), 70-100 gal (10 gal steps), OFF | Alarm OFF |
| Drain Water (power off) | Start / Cancel | Cancel |
| Scale Flushing (power off) | Start / Cancel | Cancel |
| Audible Alarm | ON / OFF | ON |
| Screen Lock | Active / Inactive (4-digit password) | Inactive |
| Units (first 10 min after power-up, power off) | [F/gal/ft] or [C/L/m] | [F/gal/ft] |
| Power Saving Dis. / Backlight | ON-OFF / Power Save ON-OFF | ON / Power Save ON |
| Brightness / Contrast / Touch Sound | Bright-Normal-Dim-Dark / -15 to +15 / ON-OFF | Normal / Standard / ON |
Setting 125 F (55 C) or higher needs Max Set Temperature raised first; the panel warns about scald risk.
Default Settings resets everything in Settings except Screen Lock (hold OK about 5 s).
- Water quality limits · Noritz EZ, Noritz NRCR
Models that show this code
5 models in Noritz EZ, Noritz NRCR
Other codes on the same units
- MM86 Maintenance monitor 86 - recirculation mode
- BURNER ON indicator Remote burner-on indicator
- Blue/Red backlight Panel backlight colour
- Display window Built-in display window (NRCR Pro)
- Flame Burner heating (flame symbol)
- Flush Mode Descaling (flush) mode
- Freeze Prevention Freeze prevention running
- GPM Hot water flow rate readout
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Source: Noritz EZ/NRCR Owner's Guide (Rev. 10-25), Configuring Settings: Maintenance Monitor / error history, p.20. Summarized in our own words; check the original manual for your model.
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.