HVACopediaNoritz · Tankless water heater
061 Recirculation abnormality (sub-code of 06)
What the control is telling you
NRCR only. Listed with 06 in the owner's guide as recirculation abnormality.
Applies to: Noritz NRCR92 / NRCR111
Likely causes
- Clogged return line filter
- Clogged crossover valve filter
- Air in the return line
Test and repair steps
- Clean the return line filter.
- Clean the crossover valve filter and check its orientation.
- Purge air from the hot and return lines (dedicated mode).
- Follow code 06 / 63 steps if it returns.
Settings for these units
- Indoor clearances (required and recommended) · Noritz NRCR
- Operation panel menu settings and defaults · Noritz EZ, Noritz NRCR
- Water quality limits · Noritz EZ, Noritz NRCR
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Source: Noritz EZ/NRCR Owner's Guide (Rev. 10-25), Checking for error conditions, p.31. Summarized in our own words; check the original manual for your model.
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