Rheem code 92: replace neutralizer soon

Condensing heaters produce acidic condensate that runs through a neutralizer before draining. Code 92 is the early warning that the neutralizer media is nearly used up.

This page uses two Rheem sources: the current Rheem and Ruud tankless troubleshooting manual, and Rheem's error code list for earlier tankless models. Codes can differ between generations, so the meaning for each is shown where they differ. Rheem technical support: (800) 432-8373.

What it means by model generation

What to do

1. Order a neutralizer kit from a Rheem or Ruud supplier.
2. Replace the neutralizer following the kit instructions.
3. Reset the unit: with the remote on and no water running, press MIN and MAX together until CL appears, then press them again for more than 5 seconds until CL disappears.

If you ignore it

The heater moves on to code 93 and will not operate until the neutralizer is replaced. Acidic condensate can also damage drains.

See our tankless water heater condensate drain and neutralizer guide.

Before you call

Have the model and serial number from the rating label ready, and note whether your unit is a condensing (high-efficiency) or non-condensing model. Tell the technician the exact code, when it appears and any recent work on the gas, water, venting or electrical supply. That often saves a second visit.

See every code on our Rheem error codes page.