HVACopedia

Rinnai · Tankless water heater

FF Maintenance performed (history marker)

Low severity Non-SENSEIRH180 hybridSENSEI RX/CXSENSEI

What the control is telling you

Not a fault: a marker in the diagnostic code history showing that a service provider performed maintenance or service on the unit.

Applies to: SENSEI Series, SENSEI RX/CX Series, Non-SENSEI Series

Likely causes

  • Service provider logged a maintenance entry after servicing
  • Marker entered manually on the controller

Test and repair steps

  1. No repair is needed; FF only records that service was done.
  2. After completing service, log FF by pressing the UP, DOWN and ON/OFF buttons at the same time.

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Source: Rinnai Troubleshooting TWH Diagnostic Codes (100000652), p.64. 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.