Noritz error code 93: neutralizer at end of life

Code 93 follows code 92. Where 92 is the early warning, 93 means the neutralizer is used up.

The meaning below comes from Noritz's own technical knowledge base. Noritz technical support: 866-766-7489.

What it means for you

Noritz says the heater's performance may be reduced until the neutralizer is replaced. Acidic condensate is also no longer being treated as it should be before it reaches the drain.

What to do

1. Replace the built-in neutralizer with Noritz part SKD7466.
2. Follow the reset procedure included with the new part to clear the code and restart the timer.

Which models

Noritz lists models including the N-0841M, N-0842M, NRC111 and NCC199 series.

Make it part of routine maintenance

The neutralizer is a wear item, like a filter. Checking it during the yearly service, along with descaling and cleaning the inlet filter, keeps codes 92 and 93 from catching you by surprise.

Before you call

Have the model and serial number from the rating label ready, along with the exact code and when it appears: at startup, during use, or only at high demand. Mention any recent work on the gas, water or electrical supply and when the heater was last serviced. This helps the technician bring the right parts and often saves a second visit.

See every code on our Noritz error codes page.