To move a washer and dryer up the stairs, first make sure you have an appliance hand truck that can hold the weight and size of your washer and dryer. Ask someone for assistance and follow the above steps to disassemble the unit and move it toward the stairs. It may be helpful to have one person steer the hand truck while the other person navigates from the front. You will want to use straps to keep the washer or dryer in place on the hand truck.
Once you reach the stairs, position the hand truck so that the wheels and handle are against the stairs. If you are worried about damaging the floors, place moving pads, blankets or cardboard down beforehand. One step at a time and with assistance, lift the hand truck to move the washer and dryer up the stairs. You can have one person lift from the top of the machine while the other lifts from the bottom. To avoid injury, lift with your legs and not your back by keeping your back straight and bending your knees.
When moving a washer and dryer up the stairs, move slowly. Take breaks to catch your breath, rehydrate and regain your energy. Once you reach the top, ensure that the washer or dryer is completely level on the ground before releasing your grip.