When can I return a thermostat? Daan March 01, 2018 19:24 Updated Follow If you are dissatisfied with the quality of your product, you can return Mysa thermostats within 30 days of delivery under our general return policy. For manufacturing defects, you can return thermostats under our warranty policy. Related articles How do I cancel my order? Can multiple phones control the same Mysa? My thermostat was damaged upon arrival, what do I do? How do I add thermostats to my account? How do I return my thermostat? Comments 0 comments Article is closed for comments.