Rinnai Tankless Water Heater: Switch the controller between Celsius and Fahrenheit
Switch the controller between Celsius and Fahrenheit on a Rinnai tankless water heater: Changes the temperature units shown on the controller.
Applies to: Rinnai SENSEI, SENSEI RX/CX and KCM tankless with a controller
How to fix switch the controller between celsius and fahrenheit: step by step
- With the water heater OFF, press and hold On/Off on the controller for 5 seconds.
- The display switches between °C and °F. Repeat to switch back.
If the unit shows an error code, look it up: Rinnai Tankless Water Heater codes
Models
SENSEI
CU160eCU160iCU199eCU199iRSC160eRSC160iRSC199eRSC199iRU130eRU130iRU160eRU160iRU180eRU180iRU199eRU199iRUR160eRUR160iRUR199eRUR199i
SENSEI RX/CX
CX160iCX199iCXP160iCXP199iRX130iRX160iRX180iRX199iRXP160iRXP199i
Source: Rinnai N-Series Residential (100000467) / with Pump (100000508) / Commercial (100000504) / RSC SENSEI (100000773) Installation and Operation Manuals, 5.4.1 p.71; Rinnai SENSEI RX Residential Installation and Operation Manual (100000839), 5.4 p.58; Rinnai KCM Series Manual (U328-0700X04), p.55. 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.