The seats come apart into three sections. Try lifting the left seat first well holding down on the centre section. All three pieces are just held together with little tabs. Then you can carry them right out the door.
We did find a solution. Our Sofa/bed and recliners the fabric was coming apart. We took the sofa bed apart and the recliners and replaced them. The problem is getting them in the door. The solution was to purchase a sofa that the backs clipped on. Once the backs were off it fit thru the door standing up. We cut down the frame of 1 sofa and took out the center sofa seat and used it as a double recliner. So check to see if the backs come off... many do today. WE went to Badcocks.