GE - IS-ZW-TSTAT-100 shows Celcius temp

I got a deal on the subject thermostat. I have it set to ‘F’, and the thermostat locally shows Fahrenheit temps. On Vera, either the browser or the smartphone app, it shows ‘F’ as the temperature unit, but the values returned are obviously Celsius. Does anyone have any idea how to change it? The ‘TemperatureScale’ variable is set to 0,1,1 and changing that doesn’t seem to do anything.