Thermostat deadband

Explanation of this in the least scientific jargon free way possible?
Many appreciations
B

Okay....

Assume we are trying to cool.

Set point = 20°C

Temperature rises to 21°C, cooler switched on.

Temperature drops to 19°C, cooler switches off.

21° - 19° = 2°K

Therefore deadband is 2°K; the temperature needs to change by 2°K before anything happens.

Air conditioning controllers have an effective dead band, in between heat cycle differential and the cooling cycle differential. So when in dead band neither heating or cooling is activated, dead band could be around 2> 3 degrees C

I can see OP questioning Degrees K Brian.
So 21 degrees C - 19 degrees C = 2 degrees C deadband. ( or 2 degrees on the Kelvin scale.)

True, thanks Mike