A refrigeration appliance (1) comprising an outer cabinet (2) and an inner liner (6) defining at least one compartment (10, 12) for the storage of products to be cooled and a working chamber (20) apt to receive at least one component (102) for the functioning of the appliance (1), wherein a first lateral base support (30) and a second lateral base support (32) facing said first lateral base support (30) at least partially laterally delimits the working chamber (20). A water collecting tray (50) at least partially delimits the working chamber (20) from above, wherein the water collecting tray (50) comprises a first end (52) apt to be connected to the first lateral base support (30) and a second end (54) apt to be connected to the second lateral base support (32). The appliance (1) comprises a centering system (60) acting to compensate the relative position between the water collecting tray (50) and the first lateral base support (30) and/or to compensate the relative position between the water collecting tray (50) and the second lateral base support (32) along both a first direction (DI) and a second direction (D2).