surface 16 of the heating element retainer 10 according to the embodiment of the invention accordingly the exemplary aspects of the invention may reduce an amount of linear translation of the heating element 26 between the pressing portion 8 a and the supporting surface 16 of the retainer 10 further the exemplary aspects of the invention may reduce an amount of force needed to push the heating element 26 into the heating element retainer 10 moreover the exemplary aspects of the invention also may provide greater flexibility for example since the pressing portion 8 a of the retainer 10 may flex to accommodate heating elements 26 of different sizes thus the exemplary aspects of the invention also may be universal to both european designs and u s designs an exemplary assembly process of a heating element 26 and a heating element retainer 10 according to the exemplary embodiments of the invention will now be described with reference again to fig8 a 8d and 9 as shown in fig8 a the cavity 40 is formed in the wall 32 of the tub 6 the heating element retainer 10 is mounted within the cavity 40 and on the wall 32 of the tub 6 when the heating element 26 is inserted into the cavity 40 the first guide surface 12 a may guide the first end of the heating element 26 onto the second guide surface 12 b as shown in.