Norcold 11cf freezer frost?

I clean the freezer about every 6 week using a hair dryer. It's normal for frost to build up on the back wall of the freezer and usual to have to defrost it once every month or so when humidity is up. On our Norcold the fresh food is automatic so it's about a half hour job to do both freezers when they need cleaning.

Excessive frosting is due to warm air getting in.

DO you what I call 'window shop'...open door and stand their looking?
Opening/closing door a lot or having door open a lot allows the cold air out/warm air in which has moisture and that creates frost.

Or the door seals are leaking allowing warm air in. To test door seals.....take a paper bill, lay it over the seals, close door. Should be heavy resistance as you pull bill out....do it in several places along all sides. If bill slips out easily...then seals are not tight and leak.

You can attempt to 'reset' the seals by warming them up with a hair dryer..... roll up some cotton balls and slip them behind seals in the corners then blowing the hot air around the seals warm them up (trick is to get the whole seal warm). Then close the door on a running fridge (cold) and let sit. As the warm seals cool they will reset.
Then remove cotton balls and check seals with paper bill.

Sometimes it works..just depends on age/condition of seals.

If they still leak..replacement time.

Just for reference:
Our fridge is ON 365 days a year. We defrost 3-4 times a year and just have a thin frost to thaw.
Good tight seals and very little 'window shopping' :B