Over time, your Eagle window regulator's parts will be worn down by the stress of dirt, heat, ultraviolet light and snow. There can be up to 35 moving parts in a window regulator, and eventually, the lack of lubrication will cause one of the parts to crack or jam up. To diagnose the problem, you must first remove the door panel and watch the window regulator in action. A visual inspection might be able to determine if the cable has become bound up, or snapped if it is a cable-operated window regulator. The issue might stem from a loose or broken fastener, rivet or bushing. The weatherstripping or gaskets might have started to deteriorate, which will jam the window from traveling up and down in its channel. If you are lucky, simply cleaning and spraying silicone lubricant on the channel liners will take care of the problem. Unfortunately, that is often a temporary fix to a problem that will return again. The window regulator is simply used so much that when it begins to deteriorate, it is worth the hassle to replace the entire mechanism. The job requires removing the door panel, which is a task for someone who is a moderately experienced DIYer. The easiest part of the job: ordering your new Eagle window regulator from our site.