Rheem Tankless Water Heater Error Code 11. Reset your rheem water heater ( press the ‘min’ and ‘max’ buttons on the control board). Rinnai error code 11 is an indication that there is no ignition in, or no gas supply to, your hot water system.

Here is the summary of what can go wrong with your rinnai water heater and what to look for after the error code 11 shows up on the remote controller. All solenoids are getting power and show correct resistances according to service manual. Check out for possible causes that generate the error code 11 on the digital display of the heater, and explore potential solutions.

Rheem Flammable Vapor Sensor Reset. Perhaps your dog had a loose bowel movement. Restore power to the water heater.

Perhaps your dog had a loose bowel movement. Firmly press the reset button to manually reset your water heater. Press and hold left and right arrow keys on the control valve at the same time, until the green light begins to blink.