Remove the old handle
Use a screwdriver to remove screws holding the old door handle. In most cases, the screws are usually visible from the faceplate but there are instances where they aren’t. If this is the case, twist a small part of the faceplate’s side to loosen the whole handle. Some handles are held in place with screws on both sides of the door that will need extra work before the knob comes off. You can purchase a door handle multi-pack to replace an old one.
Remove the faceplate and latch
Find a slot at the edge of a faceplate and insert the screwdriver’s flat head into that slot and turn it a little bit until the faceplate pops off. You will find screws under the plate. These screws hold the knob intact; remove them. You’ll then be able to remove the old latch. Also, remove the screws from the strike plate found at the door’s side.
Measure the backset
Measure the dimensions of the backset to ensure the new knot fits the bore and door frame. Backset is the distance from the centre of the bore or the big hole which holds the knob in place to the door’s edge.
Fit your new handle
Place the new latch in place and screw it using your hands. You can tighten afterwards using a drill. Put the first side of the new knob in place and then insert it into the mechanism. Place the other side on the door and then use a screwdriver to fasten the screws.
Fix old holes
In case there are old holes or makers left by the previous doorknob, they should be fixed before finishing your work. Fill these cracks and holes with door putty and add paint if possible, for a slick look. Lastly, screw the faceplate in position.