Multiport valve

A method for activating a multiport valve having a housing having a recess and at least two connectors, a control element configured to block at least one of the connectors, the control element being rotatably disposed in the recess of the housing, an external contour of the control element has a compression portion that in a first position of the control element compresses a first seal disposed on a first one of the connectors, a decompression portion of the external contour of the control element that has a smaller radius of curvature than a radius of curvature of the compression portion and in at least one further position of the control element lies opposite the first seal such that the control element compresses the first seal to a lesser extent than in the first position, wherein the decompression portion of the external contour and the compression portion of the external contour are segments of nonconcentric circles, comprising:

• adjusting the control element to the first position, in which the compression portion compresses the first seal;
• and
• adjusting the control element to one further position, in which the decompression portion lies opposite the first seal, such that the control element compresses the first seal to a lesser extent than in the first position.