Clicking, groaning, crunching: three different stories
Early warning: act nowClicking or ticking
Usually a cracked plastic guide or a cable starting to jump teeth. Plastic guides ride in the tracks and fatigue with heat and age; once one cracks, it catches at the same point every cycle: that's the rhythmic click. Each pass chews it a little further, and when it lets go completely the roof skews in its tracks and jams.
Groaning or straining
Dry rails or a stretched cable making the motor work harder than it was designed to. The system reads that extra effort, and on most roofs it will eventually protect itself by refusing to move at all. A groaning roof is a motor being slowly worn out paying for a problem that started in the tracks.
Crunching or grinding
Grit in the tracks, or broken pieces of a guide being dragged through the mechanism. This one we take seriously on the phone: hard debris scores the rails themselves, and rails are the expensive bit. If your roof crunches, stop cycling it — leave it where it is and call us before it becomes a stuck-open roof.