HVACopedia

Rinnai · Tankless water heater

03 Power interrupted during bath fill

Low severity Non-SENSEIRH180 hybridSENSEI RX/CXSENSEI

What the control is telling you

Power to the water heater was lost while a bath fill was in progress.

Applies to: SENSEI, SENSEI RX/CX and non-SENSEI tankless

Likely causes

  • Power supply was interrupted during a bath fill
  • Faulty PC Board, if the code keeps returning after resets

Test and repair steps

  1. Close all hot water fixtures.
  2. Press the ON/OFF button on the controller twice to clear the code.
  3. If the code comes back after three resets, replace the PC Board.

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Source: Rinnai Troubleshooting TWH Diagnostic Codes (100000652), p.9. Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.