Rinnai Error Code Perf data: Performance data viewer (live readings and counters) (Tankless)

Updated October 15, 2026 · by Aurora Star Tech Inc.

Rinnai error code Perf data on a tankless water heater means: Performance data viewer (live readings and counters). It is also called Rinnai diagnostic code Perf data.

Low severityTankless Water HeaterNon-SENSEI · SENSEI RX/CX · SENSEI

Homeowner? What Rinnai code Perf data means for you

Usually minor Your tankless water heater is reporting: Performance data viewer (live readings and counters). This code is usually informational or minor. The safe checks below often clear it; call us if it keeps showing up.

Safe things you can check yourself

Check that gas reaches the house: other gas appliances work, or the propane tank is not empty.
Make sure the heater is plugged in and its breaker is on. In winter, keep the power on: it protects the unit from freezing.
Outside, make sure the intake and exhaust pipes or vent cap are not blocked by snow, ice, leaves or a nest.
Check that the hot and cold water valves under the heater are fully open.
If you have a remote controller, turn it off and on once. If the code comes back, call a technician.

Call (647) 657-2977 Book a service call

Licensed technicians serving Vaughan, Toronto and the GTA.

What does Rinnai error code Perf data mean?

Read-only menu on the temperature controller that shows live readings and lifetime counters as numbered items. Nothing is wrong when you use it. Several item numbers are the same as fault code numbers (02, 03, 05, 07, 10, 11, 12, 15, 17, 19, 21, 22, 30, 31), so a number is a reading only while you are inside this menu. Which items exist depends on the model: the installation manuals list items 01 to 21, the troubleshooting guide also lists 22 to 31 and A0 to C2 for RX/CX and CX units; the tech sheet inside the front cover has the final list for the model.

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

Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.

Rinnai models that use code Perf data

Show all 88 models

C199e C199i CU160e CU160i CU199e CU199i CX160i CX199i CXP160i CXP199i R50LSi R63LSe2 R75LSe R75LSi R94LSe R94LSi R98LSe R98LSe-ASME R98LSi R98LSi-ASME RC80e RC80i RC98e RC98i RE140e RE140i RE160e RE160i RE180e RE180i RE199e RE199i REP160e REP160i REP199e REP199i RL75e RL75e(A)RL75i RL75i(A)RL94e RL94i RLX94i RSC160e RSC160i RSC199e RSC199i RU80e RU80i RU90e RU98e RU98i RU130e RU130i RU160e RU160i RU180e RU180i RU199e RU199i RUC80i RUC90i RUC98i RUCS65i RUCS75i RUR98e RUR98i RUR160e RUR160i RUR199e RUR199i RUS65e RUS75e RX130i RX160i RX180i RX199i RXP160i RXP199i V53De V53e V65e V65i V75e V75i V94e V94i V94Xi

Other Rinnai Tankless codes

Code	Meaning
Mute	Controller key beeps on/off
nG	Initial setting: natural gas
ON	Hot water running (controller installed)
Out	Initial setting: outdoor installation
Parameter mode	Parameter settings menu
Parameter settings	Parameter (installer settings) mode
Performance data	Performance data readout mode
Priority light	Priority light on (this controller is in charge)
rnS	Descaling finished, rinse now
S	Venturi reset sequence: step S (SENSEI)
SE	Cascade diagnostic display (error on secondary unit)
SEt	Initial settings not yet confirmed

All Rinnai Tankless Water Heater error codes →

Rinnai code Perf data: homeowner questions

What does Rinnai code Perf data mean?

Performance data viewer (live readings and counters). Read-only menu on the temperature controller that shows live readings and lifetime counters as numbered items. Nothing is wrong when you use it. Several item numbers are the same as fault code numbers (02, 03, 05, 07, 10, 11, 12, 15, 17…

Is it safe to keep using my tankless water heater with code Perf data?

Usually yes. Code Perf data is normally minor, but if it keeps coming back have it checked.

Can I reset Rinnai code Perf data myself?

You can try one reset (power off for 30 seconds, then on). If Rinnai code Perf data comes back, the cause is still there and a licensed technician should check it.

Who can fix Rinnai code Perf data near me?

Aurora Star Tech Inc. repairs Rinnai tankless water heaters in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.

Homeowner help: Tankless Water Heater No Hot Water: What to Check

Troubleshooting guides

No hot water All brands · Tankless Water Heater
Water temperature fluctuates All brands · Tankless Water Heater
Checking PC board fuses and thermistors Rinnai · Tankless Water Heater
Enter installer parameter mode (A button on the PC board) Rinnai · Tankless Water Heater
First power-up setup: gas type and indoor/outdoor (RX/CX) Rinnai · Tankless Water Heater
Lock or unlock the controller (key symbol) Rinnai · Tankless Water Heater
Lock or unlock the KCM controller (LOC) Rinnai · Tankless Water Heater
Performance data readout (items 01 to 24) Rinnai · Tankless Water Heater
Reset after cleaning the venturi or replacing the gas valve (codes 17 / 52) Rinnai · Tankless Water Heater
Reset the Service Soon (SS) reminder Rinnai · Tankless Water Heater
Show live flow and outlet temperature on the KCM controller Rinnai · Tankless Water Heater
Show the last 9 stored codes (diagnostic history) Rinnai · Tankless Water Heater
Start descaling (vinegar flush) mode on the PC board Rinnai · Tankless Water Heater
Switch the controller between Celsius and Fahrenheit Rinnai · Tankless Water Heater
Turn controller key beeps on or off Rinnai · Tankless Water Heater
Weak or missing flame signal (flame rod checks) Rinnai · Tankless Water Heater

Source: Rinnai Troubleshooting TWH Diagnostic Codes (100000652), View Performance Data p.73-75; Rinnai N-Series Residential (100000467) / with Pump (100000508) / Commercial (100000504) / RSC SENSEI (100000773) Installation and Operation Manuals, 5.5 Performance Data; Rinnai SENSEI RX Residential Installation and Operation Manual (100000839), 5.5 p.58. Written in our own words as a summary; always check the original manual.

General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.