What must be done each time the Robertshaw "H" model thermostat is turned off and back on?

The correct action to take each time the Robertshaw "H" model thermostat is turned off and back on is to push the reset button. This function ensures that the thermostat resets its internal mechanisms and accurately tracks the temperature changes within the environment.

After turning the thermostat off and on, the unit may have residual settings that could lead to inaccurate readings or operational issues. By pushing the reset button, you clear any temporary settings or discrepancies and return the thermostat to its default operational state. This can prevent potential malfunctions and ensure accurate temperature control in your system.

While changing the temperature setting, waiting for the temperature to stabilize, or calibrating the thermostat may be useful in different scenarios or as part of regular maintenance, these actions are not specifically required each time the thermostat is powered back on. The reset button is a crucial step to ensure that the device functions correctly after being turned off.