Viking VCBB363RSS unit is not cooling enough. .The temp will not get cool enough, all the lights still work no problems otherwise. is there something I can do to get the temp correct.

I have this same model fridge. So I would say start with the simple fix first. First check to see if your freezer gasket is still holding fast. You can usually see if the gasket is broken. Without a good seal temp will be a problem. The seal is a $120.00 part. It could just be the Thermistor. It regulates the temp in the freezer compartment. If the freezer gets slammed shut frequently enough it can fail early. The thermistor is a $35.00 part. It requires only that you gently loosen it with plastic putty knife. You can use a metal ***** driver but if you slip you can scratch the wall. Lift the old thermistor out and then press the new one into place. It is located on the back wall of the freezer. The most difficult thing is unplugging the refrigerator before you start. Because this is a built unit it would require a great deal of work by two large men. So make it easy on yourself. Get a good strong flash light. Go to the fuse box and turn off the 15 amp breaker. Do your thermistor switch exchange and turn the power back on. It can take 24 hours for a freezer this size to get cold again so leave the thing closed. I have this same model fridge. So I would say start with the simple fix first. First check to see if your freezer gasket is still holding fast. You can usually see if the gasket is broken. Without a good seal temp will be a problem. The seal is a $120.00 part. It could just be the Thermistor. It regulates the temp in the freezer compartment. If the freezer gets slammed shut frequently enough it can fail early. The thermistor is a $35.00 part. It requires only that you gently loosen it with plastic putty knife. You can use a metal ***** driver but if you slip you can scratch the wall. Lift the old thermistor out and then press the new one into place. It is located on the back wall of the freezer. The most difficult thing is unplugging the refrigerator before you start. Because this is a built unit it would require a great deal of work by two large men. So make it easy on yourself. Get a good strong flash light. Go to the fuse box and turn off the 15 amp breaker. Do your thermistor switch exchange and turn the power back on. It can take 24 hours for a freezer this size to get cold again so leave the thing closed.