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The holiday button that is fitted to certain models is to be used after you have emptied the appliance and intend to be away from the house for a number of days or weeks.
During this period of absence your appliance will run on the bare minimum of temperatures within the freezer compartment and disconnect the cooling apparatus within your fridge.
Using the assumption that as you are away from your appliance and that the doors will be kept shut, the energy consumption will be much lower.
Do not press the holiday button unless the fridge compartment of your Hotpoint appliance is empty as selecting this option whilst the fridge is full will result in food loss.
If you need further assistance please call Hotpoint customer service on 0344 822 4224.