IBS-P01RS won't change to Fahrenheit

I have an IBS-P01RS remote pool thermometer. For some reason the sensor turned to Celsius and won’t go back to Fahrenheit. I have a one-button model. When I press it for 5 seconds or 10 seconds nothing happens.

The receiver is working okay.

Any ideas how to get this to change?

Is the IBS-P01R-O transmitter connected to the IBS-P01R-I receiver?
If not, please connect the IBS-P01R-O transmitter to the IBS-P01R-I receiver and then switch the temperature unit via the CF button.

Thank you. I thought I tried that. It’s back to reading Fahrenheit now. :slightly_smiling_face:

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