How long can I set a cool-off for? How long can I set a cool-off for? You can set a cool-off at any time for periods ranging from 24 hours up to six weeks. If you need any further assistance, please see our contact details here. Related articles How do I set a cool-off? How do I keep track of when the cool-off ends? Contact us What's a cool-off period? What happens at the end of the cool-off?