Rheem · Water heater
Code 32 Heat exchanger problem
What this code means
A fault has been detected in or around the heat exchanger itself.
Most likely causes
- Scale buildup restricting flow
- Physical damage or leak in the heat exchanger
What to try first
Beyond checking for obvious leaks, this needs professional diagnosis.
Safety note: if this code returns after one clean reset, stop resetting it — repeated lockouts usually mean a real fault that needs a licensed technician. Never bypass a safety switch.
FAQ
What does Rheem error code Code 32 mean?
Heat exchanger problem. A fault has been detected in or around the heat exchanger itself.
Can I fix Rheem code Code 32 myself?
Usually not. Beyond checking for obvious leaks, this needs professional diagnosis. If the code returns after one reset, it needs a licensed technician.
What causes Rheem code Code 32?
The most common causes are: scale buildup restricting flow; physical damage or leak in the heat exchanger.
Other Rheem water heater codes
All Rheem water heater error codes →
Other water heater brands: Ruud · Rinnai · Navien · Noritz · Takagi · A.O. Smith · Bradford White · State / American · Generic electric · Generic tankless
This information may contain errors or not apply to your exact model — always double-check it against your appliance's own manual before acting. If there's any chance of a gas, fire, electrical, carbon monoxide, or other safety hazard, stop and call a licensed professional or the appropriate agency (e.g. your gas utility) instead of relying on this page alone.