1. A heat system for a vehicle, comprising:a refrigeration circuit; and
two cooling circuits which are an LT circuit and an HT circuit which are operable independently of each other and in which there is arranged in each case a cooler, which are an LT cooler and an HT cooler, respectively, wherein
the two cooling circuits are coupled to each other via two coupling points for the purpose of exchanging a coolant and have a common line section which extends between the two coupling points and on which, for the purpose of heating an interior compartment, a heating heat exchanger is arranged,
in the two cooling circuits, there is arranged in each case a heat exchanger, which are an LT heat exchanger and an HT heat exchanger, respectively, for absorbing a waste heat of a respective vehicle component, and
the two cooling circuits are in each case, independently of each other, switchable over between a cooling mode for releasing the waste heat of the respective vehicle component via the respective cooler and a heating mode for releasing the waste heat of the respective vehicle component via the heating heat exchanger.