No your cell is not broken. It's the nature of the Goldline. Again, increase the salt level to the upper end of the recommended salt range by Goldline and it will help the system somewhat.

It explain it a little more, a salt chlorine generator cell relies on conductivity of the water to pass the electricity across all the blades in the cell. When the temps decrease (colder), the conductivity also decrease. Salt increases the conductivity. So, one of the ways to compensate is to increase the salt level. In this case, I believe Goldline recommends no higher than 3500 or 3600 ppm of salt. Therefore, increase the salt level to 3600 ppm.

It will help to a certain point, then the conditions will exceed the capability for the system to operate properly. At that point, it will not cycle on and off, but it should stay off, under the protect mode.