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 Contact us What happens at the end of the cool-off? How do I set a cool-off? How do I keep track of when the cool-off ends? What's a cool-off period?