Heat is not the problem the problem is Untriaged tickets.do this test.
1) go to your closed ticket and remove the Assignee make sure it is assigned to a group that you belong to. Then kill the Weather daemon to force the recalculation.
2) check the weather and you will now see in the current forecast (group name) has 1 untriaged and 0 high heat with a number beside it probably 4
if the ticket is closed it should not show up as being untriaged.