Rinnai HE Series How To Use Manual page 187

1. Check wiring harness at leak detector for loose, broken or damaged wiring or connections.
2. Check the heat exchanger and all piping inside the unit for leaks.
3. If no leaks are found inspect inside of cabinet for signs of water pooling on bottom pan of water
heater. Wipe or blow out any water found in cabinet. Dry off leak sensor and restart unit.
4. If no water is found in cabinet unplug sensor and fire water heater. If unit operates with sensor
unplugged replace sensor and screw.
Code 79 Troubleshooting Procedure
Water Leakage Detected
35