If your sunroof is having issues opening, it may be due to a problem with the sunroof motor. The sunroof motor is responsible for powering the sunroof open and closed. If the motor is not working properly, it can cause the sunroof to get stuck in one position or not work at all.
There are a few other things that can cause a sunroof to stop working. If the sunroof tracks are dirty or obstructed, this can prevent the sunroof from moving. Additionally, if the weather stripping around the sunroof is damaged, it can allow water and debris to enter the vehicle, which can also cause problems with the operation of the sunroof.