Code 32
Rinnai
Outlet Thermistor Fault
Unit displays Code 32 and will not run
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Open or shorted outlet thermistor, Loose or damaged wiring harness, Corroded connector, Faulty control board
How to Fix / Troubleshooting
Safety first: Turn OFF power and gas before servicing.
Steps to check:
- Locate outlet thermistor: Find the thermistor attached to the hot water outlet pipe or near the heat exchanger outlet.
- Inspect harness: Check that the thermistor plug is fully seated on the control board and at the sensor. Look for cuts or abrasions in the cable.
- Reseat connectors: Disconnect and reconnect the thermistor plug to ensure a good electrical connection.
- Reset and test: Restore power and gas, reset the unit, and attempt operation.
When to call a professional: If Code 32 persists, the outlet thermistor or control board should be tested and replaced by a technician.
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Repair Difficulty
Medium
3/5
Required Part
Outlet Thermistor
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