Hiring a professional to replace your rollers could cost you around $100 not including the cost of the replacement parts. Below are detailed steps containing all the information you will need to know to replace your patio sliding glass door rollers yourself.
* Before you start, understand that you need to take the sliding glass door out of its frame to work on the rollers. The sliding glass door is heavy. You may need the assistance of another to help you remove the door.
1) Your patio glass door will have two separate glass units. One unit is the door that you slide and the other unit is stationary. First, stand outside your house and look at your sliding glass door. If the stationary unit is between you and the sliding unit you will most likely have to remove the stationary unit so that you can get to the glass sliding unit.
Before you go through the trouble of removing the stationary unit, first try to go inside your house and see if you can remove the sliding unit. Usually you cannot because there is a lip along the bottom of the patio glass door frame (it keeps moisture out of the house) that prevents the sliding glass door from being removed from the inside.
If the rollers on the bottom of the door are difficult to get over the lip, you can adjust them to help you create more room (go down to step 2). If it is not the rollers but the sliding unit